Endocrine System and Adolescence
Endocrine System and Adolescence
The word ‘adolescence’ comes from the Latin word                         Ovulation and menstruation start
‘adolescence’ which means ‘to grow’. Adolescence describes
the teenage years between 13 and 19 and can be considered the            Hips become wider.
transitional stage from childhood to adulthood.
                                                                         An increase in height occurs
However, the physical and psychological changes that occur in
adolescence can start earlier, during the preteen years (ages 9          Feelings and sexual drives associated with adulthood begin to
through 12).                                                             develop.
Adolescence can be a time of both disorientation and discovery.          Hormones and Endocrine Glands
The transitional period can bring up issues of independence and
self-identity.                                                           What exactly are hormones and how are they different from
                                                                         “non-hormones”?
Physiological changes in adolescence:
                                                                         Hormones are chemical messengers secreted into the blood or
Enhanced growth and development                                          extracellular fluid by one cell that affect the functioning of other
                                                                         cells.
Changes in attitude, appearance, and personality
                                                                         Most hormones circulate in the blood, coming into contact with
Hormonal changes inside the body Behavioural changes in                  essentially all cells. However, a given hormone usually affects
adolescence:                                                             only a limited number of cells, which are called target cells. A
                                                                         target cell responds to a hormone because it bears receptors for
Enhancement of thinking ability encompassing future thinking.            the hormone.
Deepening of voice                                                       Glands that do not have any ducts or tubes are called endocrine
                                                                         glands. Endocrine glands secrete hormones, which are chemical
Spermatogenesis starts                                                   “messengers” that travel through the blood to regulate the
                                                                         activity of a target organ.
The body becomes muscular with the rapid increase in height.
                                                                         Examples: Pituitary gland, Thyroid gland, Adrenal gland, etc.
Feelings and sexual drives associated with adulthood begin to
develop.                                                                 Glands that have ducts are called exocrine glands. The
                                                                         secretions of exocrine glands reach their target by traveling
The various changes which occur in girls during puberty:                 through a duct (tube).
                                                                Page 1 of 19
Exocrine glands are not part of the endocrine system. Some              and liver, thymus, skin, and placenta — also produce and
examples of exocrine glands are sweat glands and salivary               release hormones.
glands. There are some glands that are both endocrine and
exocrine in nature. These are called mixed glands.                      Hypothalamus
Pancreas is a mixed gland. The endocrine part secretes major            The hypothalamus, a collection of specialized cells that are
hormones of the body and the exocrine part creates pancreatic           located in the lower central part of the brain, is the primary link
enzymes which are needed for digestion.                                 between the endocrine and nervous systems.
Endocrine System                                                        Nerve cells in the hypothalamus control the pituitary gland by
                                                                        producing chemicals that either stimulate or suppress hormone
The foundations of the endocrine system are the hormones and            secretions from the pituitary.
glands. As the body’s chemical messengers, hormones transfer
information and instructions from one set of cells to another.          Pituitary Gland
Although many different hormones circulate throughout the               Although it is no bigger than a pea, the pituitary gland, located
bloodstream, each one affects only the cells that are genetically       at the base of the brain just beneath the hypothalamus, is
programmed to receive and respond to its message.                       considered the most important part of the endocrine system.
Oxytocin,
make sex hormones. The pituitary gland also controls ovulation          vessels reaching the skin and kidneys constrict in order to
and the menstrual cycle in women.                                       provide more blood to the heart and the brain.
The posterior lobe of the pituitary releases antidiuretic hormone,      They also increase fat metabolism thereby synthesizing more
which helps control body water balance through its effect on the        energy. The word adrenaline is used in common parlance to
kidneys and urine output; and oxytocin, which triggers the              denote increased activation of the sympathetic system associated
contractions of the uterus that occur during labor.                     with the energy and excitement of the fight-or-flight response.
The pineal body, also called the pineal gland, is located in the        The pancreas produces (in addition to others) two important
middle of the brain. It secretes melatonin, a hormone that may          hormones, insulin, and glucagon. They work together to
help regulate the wake-sleep cycle.                                     maintain a steady level of glucose, or sugar, in the blood and to
                                                                        keep the body supplied with fuel to produce and maintain stores
Thyroid and Parathyroids                                                of energy.
The thyroid, located in the front part of the lower neck, is            Gonads or Reproductive Glands
shaped like a bow tie or butterfly and produces the thyroid
hormones thyroxine and triiodothyronine.                                The gonads are the main source of sex hormones. In males, they
                                                                        are located in the scrotum. Male gonads, or testes, secrete
These hormones control the rate at which cells burn fuels from          hormones called androgens, the most important of which is
food to produce energy. As the level of thyroid hormones                testosterone.
increases in the bloodstream, so does the speed at which
chemical reactions occur in the body.                                   These hormones regulate body changes associated with sexual
                                                                        development and the appearance of other male secondary sex
Thyroid hormones also play a key role in the bone nervous               characteristics such as the deepening of the voice and the
system in children. The production and release of thyroid               increase in muscle growth and strength.
hormones is controlled by thyrotropin, which is secreted by the
pituitary gland.                                                        The female gonads, the ovaries, are located in the pelvis. They
                                                                        produce eggs and secrete the female hormones estrogen and
Attached to the thyroid are four tiny glands that function              progesterone. Estrogen is involved in the development of female
together called the parathyroids. They release parathyroid              sexual features.
hormone, which regulates the level of calcium in the blood with
the help of calcitonin, which is produced in the thyroid.               Both estrogen and progesterone are also involved in pregnancy
                                                                        and the regulation of the menstrual cycle.
Adrenal Glands
                                                                        Table of Endocrine glands, their hormones, and the action of the
The body has two triangular adrenal glands, one on top of each          hormone
kidney. The adrenal glands have two parts, each of which
produces a set of hormones and have a different function.
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                                                                         Adolescent Development
5. Diabetes mellitus: Disorder in which the body’s cells cannot
absorb glucose, either because the pancreas does not produce             A critical and rapid transition
enough insulin or the cells do not respond to the effects of
insulin that are produced. It has two types.                             WHO identifies adolescence as the period in human growth and
                                                                         development that occurs after childhood and before adulthood,
Type-1 Diabetes:                                                         from ages 10 to 9.
When the pancreas fails to produce enough insulin, type 1                It represents one of the critical transitions in the life span and is
diabetes (previously known as juvenile diabetes) occurs. Type 1          characterized by a tremendous pace of growth and change that is
diabetes can cause long-term complications, including kidney             second only to that of infancy.
problems, nerve damage, blindness, early coronary heart disease,
and stroke.                                                              Biological challenges as young people transition from childhood
                                                                         to adulthood. It can seem like teens have processes that drive
To control their blood sugar levels and reduce the risk of               many aspects of this growth and development,
developing diabetes complications, kids need regular injections
of insulin.                                                              The onset of puberty marks the passage from childhood to
                                                                         adolescence. The biological determinants of adolescence are
Type-2 Diabetes :                                                        fairly universal;
Unlike type 1 diabetes, in which the body can’t produce normal           however, the duration and defining characteristics of this period
amounts of insulin, in type 2 diabetes the body is unable to             may vary across time, cultures, and socioeconomic situations.
respond to insulin normally.
                                                                         Key developmental experiences
Children and teens with this condition tend to be overweight,
and it is believed that excess body fat plays a role in the insulin      The process of adolescence is a period of preparation for
resistance that characterizes the disease.                               adulthood during which time several key developmental
                                                                         experiences occur.
6. Adrenal insufficiency: This condition is characterized by
decreased function of the adrenal cortex and the consequent              Besides physical and sexual maturation, these experiences
underproduction of adrenal corticosteroid hormones.                      include movement toward social and economic independence,
                                                                         and development of identity, the acquisition of skills needed to
The symptoms of adrenal insufficiency may include weakness,              carry out adult relationships and roles, and the capacity for
fatigue, abdominal pain, nausea, dehydration, and skin changes.          abstract reasoning.
7. Addison’s disease: Disorder in which the adrenal cortex               While adolescence is a time of tremendous growth and potential,
underproduces cortisol and aldosterone, resulting in the                 it is also a time of considerable risk during which social contexts
disruption of numerous bodily functions.                                 exert powerful influences. one foot in childhood and one in
                                                                         adulthood as they navigate the changes in their bodies and
8. Cushing syndrome: If the condition is due to a tumor in the
                                                                         minds.
pituitary gland that produces excessive amounts of corticotropin
and stimulates the adrenals to overproduce corticosteroids, it’s         Some of the normal changes going on for teens
known as Cushing’s disease.
                                                                               1.   With the onset of puberty, preteens and teenagers
Symptoms may take years to develop and include obesity,                             experience rapid growth and changes in their bodies,
growth failure, muscle weakness, easy bruising of the skin, acne,
high blood pressure, and psychological changes. Moon face- a
                                                                Page 5 of 19
           develop sexually, and become increasingly aware of              Moral and ethical choices are now possible and often guide
           their body image.                                               behavior.
    2.     Teens develop their own morals, values, and self-
           direction; they test limits and try on different points of      Development diversity leads to varying abilities to think and
           view; they develop a conscience.                                reason.
    3.     Social skills continue to develop and include romantic
           relationships.                                                  Cognitive ability is often affected by overall socialization.
    4.     Teens have an increased awareness of self, which can
           include feeling self-conscious and fluctuating high or          Perspectives about past, present and future developments that
           low self-esteem,                                                allow enhanced perspectives of time.
    5.     Teens continue to develop cognitively, with an
                                                                           Language and overall verbalization skills increase, allowing
           increased capacity for problem-solving, decision-
                                                                           improved communication in both school and home situations.
           making, and abstract thinking;
    6.     however, their thinking is still more impulsive than            Significance of Adolescence Stage
           adults; for example, the mere presence of peers can
           encourage them to engage in risky behavior.                     Adolescence is a significant period because it is a period of:
Changes during Adolescence                                                 1. Rapid physical development-It is a period of vital physical
                                                                           as well as physiological changes and developments. At this
Physical                                                                   stage, all the external and internal body parts and organs achieve
                                                                           their full form and maturity.
Physical changes (e.g., growth spurt and skeletal and structural
changes) are rapid and visually apparent.                                  2. Rapid mental development-During the early adolescence
                                                                           period, rapid mental development occurs. These give rise to the
Considerable diversity in physical developmental rates occurs
                                                                           need for later mental adjustments and the necessity for
due to genetics, environmental factors, and health issues.
                                                                           establishing new attitudes, values, and interests.
Distinct gender differences are evident in size, strength, and age
                                                                           The adolescent is mentally alert at this stage. He not only
of growth spurt (e.g., girls around age 12 and boys around age
                                                                           develops his intellectual power but also his capacity to critical
14).
                                                                           thinking.
Self-esteem changes due to adolescents’ home and school lives.
                                                                           3. Rapid social development-It is a period of social
Preoccupations with the self lead to critical self-examination             development and adjustment. In this stage, the child enters a
and subsequently to the formation of self-perceptions.                     new field of social responsibility. The adolescents become
                                                                           socially conscious, self-assertive, and loyal towards their group;
Argumentative and aggressive behaviors become evident and                  they develop cooperation and friendship and become
often disturb parents and teachers.                                        responsible.
Distinct gender differences occur in socialization patterns (e.g.,         The adolescents also develop dependency and sometime
females tend to have smaller numbers of close friends and males            independency. They also develop some special feelings like –
tend to have larger “social networks”).                                    pride, humility, curiosity, guilt, hero-worshipping, etc.
Allegiance and affiliation shift from parents and teachers to              All these emotions must be properly guided and they should be
friends and peers.                                                         provided knowledge to control their emotions at this stage.
Social tasks and situations are handled without adult supervision          5. Rapid sexual development-A number of internal and
and advice.                                                                external changes take place in the sexual characteristics of boys
                                                                           and girls during the adolescence stage. In the later part of this
Cognitive                                                                  stage, they achieve sexual maturity.
Higher levels of cognitive functioning (e.g., reasoning and                6. Rapid moral development-It is also a period of moral
higher-level thought processes) develop.                                   development and changes in morality. Their moral outlook
Page 6 of 19
becomes progressively more abstract. Moral convictions                     Question1. Along with the nervous system, the system
become more concerned with ‘what is right’ and justice emerges             coordinates the various activities of body parts.-Digestive/
as a dominant moral force.                                                 Endocrine/Circulatory/Excretory
Their moral judgment becomes less egocentric at this stage.                Answer: 2. Digestive
They develop an attitude towards service to mankind.
                                                                           Question2. These are chemical messengers that are produced in
Problems of Adolescence Stage                                              one body region but affect a different body region.-Hormones/
                                                                           Enzymes/Endocrines/Vitamines
The problems of adolescence may be summarized in the
following manner:                                                          Answer: 1. Hormones
1. Sex Problems-We have read that all the aspects of adolescent            Question3. Hormones are substances that fall into two basic
development are basically conditioned by physical changes. The             categories.-Proteins and sugars/Male hormones and female
onset of puberty gives the physical excitement never                       hormones/Non-steroid and steroid hormones./Organic and
experienced before.                                                        inorganic
The adolescent reacting to these experiences is excited, often             Answer: 3. Non-steroid and steroid hormones.
without realizing what is happening to him. Some react with
pleasure or excitement and some others experience shame,                   Question4. The hypothalamus regulates-Heart rate/Body
disgust, confusion, anxiety, and guilt. They may lead to sexual            temperature/Both 1 and 2 correct/None of 1 and 2 are correct
maladjustment.
                                                                           Answer: 3. Both 1 and 2 correct
2. Emotional Problem-Heightened emotionality is a major
problem of adolescence. Adolescents experience excessive                   Question5. The posterior pituitary secretes-ADH             and
emotion and they do not have sufficient control over violence.             oxytocin/Estrogen      and      testosterone/Adrenalin      and
                                                                           insulin/Epinephrine and norepinephrine
Excitability and anger may find expression in their destructive
form and may lead to law and order problems. The emotion of                Answer: 1. Estrogen and testosterone
love, suspicion, jealousy, frustration, and revengefulness is very
common among adolescents. Thus emotional immaturity is a                   Question6. The function(s) of oxytocin is/are to-Cause the
major problem in adolescence.                                              uterus to contract/Induce labor/Both and correct/None of and are
                                                                           correct
3. Social Problem-Every society has its own customs and
traditions, which it wants to maintain. Every individual has to            Answer: 3. Induce labor
follow these social values but often adolescents think all these
                                                                           Question7. Hypothalamic releasing and release-inhibiting
are outdated and they are not willing to obey
                                                                           hormones are transported from the hypothalamus to the anterior
This leads to conflicts. Physical development has many social              pituitary by the way of-The general bloodstream/A portal
implications. Sexual development necessarily includes                      system of blood vessels directly connecting the two
heterosexual orientation and they want to take part in social              organs/Direct contact between the two organs/Nervous system
activities with the opposite sex.
                                                                           Answer: 2. A portal system of blood vessels directly connecting
The denial of this desire often makes them discontented and                the two organs
restless. Drug addiction is a major social problem during
                                                                           Question8. Hormones produced by the anterior pituitary that
adolescence.
                                                                           have a direct effect on the body, rather than trigger another
Drugs are powerful chemicals that when taken into the body                 gland, are-TSH, ACTH, and gonadotropic hormones/GH,
change the functions of the body, influence the mind, and                  prolactin and MSH/Testosterone and estrogen/STH and lh
therefore, sometimes even change the behavior of the person.
                                                                           Answer: 2. GH, prolactin and msh
Adolescent boys and girls should avoid drugs to maintain
                                                                           Question9. GH does not promote.-Fatigue/Cell division/Protein
physical, mental and social well-being which are necessary to
                                                                           synthesis/Lipid metabolism
live a purposeful, fruitful, and satisfying life in this world. Thus,
a number of social problems disturb adolescents.                           Answer: 1. Fatigue
                            Questions
Page 7 of 19
Question10. Which hormone dramatically affects physical                Answer: 4. The inner medulla and the outer cortex
appearance?-Gonadotropin-releasing hormone/Growth/Steroid/
None of these                                                          Question20. The adrenal medulla secretes under conditions of
                                                                       stress.-Norepinephrine/Epinephrine/Norepinephrine       and
Answer: 2. Growth                                                      epinephrine/Aldosterone
Question16. Hypothyroidism in adults produces a condition              Question26. The pancreatic islets produce-Insulin             and
called.-Myxedema/Goiter/Acromegaly/Cretinism                           glucagon/Pancreatin/ACTH and aldosterone/ADH and lH
Question17. In addition to thyroxine and triiodothyronine, the         Question27. Insulin functions too.-Promote the storage of
thyroid gland produces-TSH/ACTH/Calcitonin/Gluco corticoid             nutrients/Lower the blood glucose level by stimulating liver, fat,
                                                                       and muscle cells to metabolize glucose/Stimulate uptake of
Answer: 3. Calcitonin                                                  glucose by cells/Promote the transformation of liver glycogen
                                                                       into glucose
Question18. If the insufficient path is produced, the blood
calcium level drops, resulting in-Reduced growth in childhood          Answer: 3. Stimulate uptake of glucose by cells
or parathyroid dwarfism/Tetany, where the body shakes from
continuous muscle contraction/Exophthalmic goiter/Virilism             Question28. In diabetes, the pancreas is not producing insulin.-
                                                                       Type I/Type ii/Type iii/None of these
Answer: 2. Tetany, where the body shakes from continuous
muscle contraction                                                     Answer: 1. Type I
Question19. The adrenal glands consist of-The inner and outer          Question29. These are the male sex                    hormones.-
layers of the kidney/The inner cortex and the outer                    Progesterone/Estrogens/Aldosterones/Androgens
medulla/Lower adrenal and upper pararenal sections/The inner
medulla and the outer cortex                                           Answer: 4. Androgens
Page 8 of 19
Question30. Hormones are released by-Endocrine glands/                  Question39. When an adolescent’s facial hair starts growing, or
Heterocrine glands/Apocrine glands/Both 1 and 2                         acne develops, or breasts start to grow, or the genitals start to
                                                                        change, which organ in the body are these changes directly
Answer: 4. Both 1 and 2                                                 caused by?-The hypothalamus/The adrenal glands/The
                                                                        brain/The ovaries or testicles
Question31. The produces the hormone melatonin.-Pituitary
gland/Pineal gland/Thyroid gland/Parathyroid gland                      Answer: 4. The ovaries or testicles
Answer: 2. Pineal gland                                                 Question40. A man suddenly sees a tiger. His heart beat goes
                                                                        up, his blood pressure increases, etc. Which hormone is released
Question32. When a hormone name ends in “tropic,” what does             at this time in the body?-Corticoid/Parathormone/
this mean?-The hormone stimulates the metabolism of the cell it         Adrenaline/Thyroxine
contacts/It means the hormone affects another “target”
endocrine gland/It means it is a posterior pituitary hormone/The        Answer: 2. Parathormone
hormone is self-destructive in nature
                                                                        Question41. Muscle growth during puberty occurs-Only in
Answer: 2. It means the hormone affects another “target”                males/Only in females/In both genders/In none of the genders
endocrine gland
                                                                        Answer: 1. Only in males
Question33. Which endocrine glands are stimulated?-Thyroid/
Testes/ovaries/Adrenal medulla/Pituitary                                Question42. A late development in the pubertal sequence of
                                                                        females    is-Breast    development/Growth     of    pubic
Answer: 2. Testes/ovaries                                               hair/Menarche/Oogenesis
Answer: 3. Cortisol                                                     Question44. Which of the following endocrine glands does 49?
                                                                        Not occur        as a pair in        the human        body?-
Question36. The development of primary sex characteristics is           Adrenal/Pituitary/Testis/Ovary
evidenced by-A rapid change in height and weight/Growth and
development of the ovaries/Growth and development of the                Answer: 2. Pituitary
breasts/Modulation of voice
                                                                        Question45. While adolescence is naturally a very healthy 50.
Answer: 3. Growth and development of the breasts                        Period of life, many adolescents experience health problems due
                                                                        to-Genetic defects/Hormonal dysfunction/Lifestyle choices/
Question37. As opposed to primary sexual characteristics,               Immature brain development
changes in secondary sexual characteristics are mostly evident
changes in-Reproductive capacity/The skeletal system/External           Answer: 3. Lifestyle choices
appearance/Endocrine system
                                                                        Question46. Which group of adolescents evidence the highest
Answer: 3. External appearance                                          rates of drug and alcohol use in early adolescence?-Late
                                                                        maturing males/Average maturing males/Early maturing
Question38. If an adolescent was exposed to an external                 males/None of these
stimulus that artificially raised the level of sex hormones in the
body, how would the hypothalamus likely to respond?-By                  Answer: 3. Early-maturing males
changing the instructions it sends to the pituitary gland/By
altering the instructions it sends to the gonads/By ignoring the        Question47. Which one is a mixed gland?-Kidney/Thyroid/
artificial levels of sex hormones in the body/Becoming dormant          Sweat/Pancreas
Page 9 of 19
Question48. Which hormone(s) is/are known as the fright and         Answer: Adolescence
flight hormone?-Adrenaline and nor-adrenaline/Oxytocin and
vasopressin/TSH and ACTH/Insulin and glucagon                       Question9. The word ‘adolescence’ comes from the Latin word
                                                                    _________ which means ‘to grow’.
Answer: 1. Adrenaline and nor-adrenaline
                                                                    Answer: Adolescere
Question49. The chemical structure of a hormone enables it to
combine with a receptor in the cells of its-Target/                 Question10. _________ is the time in which a child’s sexual
Gland/Organ/All of these                                            and physical characteristics mature.
Question50. Life skill education is needed for-Early                Question11. During puberty, various endocrine glands produce
identification and intervention of problem/Development of           _________ that cause body changes
psycho-social capacity/Building self-image/All of these
                                                                    and the development of secondary sex characteristics.
Answer: 4. All of these
                                                                    Answer: Hormones
Question1. Acromegaly and gigantism are the results of
_________ of growth hormone.                                        Question12. Hormones are _________ messengers secreted into
                                                                    the blood.
Answer: Hypersecretion
                                                                    Answer: Chemical
Question2. The largest pure endocrine gland in the body is the
_________.                                                          Question13. A given hormone usually affects only a _________
                                                                    limited number of cells, which are called cells.
Answer: Thyroid
                                                                    Answer: Target
Question3. Alpha islet cells of the pancreas produce _________,
an extremely potent hyperglycemic hormone.                          Question14. A target cell responds to a hormone because it
                                                                    bears _________ for the hormone.
Answer: Glucagon
                                                                    Answer: Receptors
Question4. The _________ gland may influence our day/ night
cycles and even regulate the onset of sexual maturity.              Question15. The endocrine system is composed of _________
                                                                    glands.
Answer: Pineal
                                                                    Answer: Ductless
Question5. The _________ gland is especially large in early
childhood; then declines in size and function with age.             Question16. Nerve cells in the control the pituitary gland by
                                                                    producing chemicals that either stimulate or suppress hormone
Answer: Thymus                                                      secretions from the pituitary.
                                                                    Answer: ADH
                                                           Page 10 of 19
Question20. _________ gland secretes melatonin, a hormone            Question31. Who identifies _________ as the period in human
that may help regulate the wake-sleep cycle.                         growth and development that occurs after childhood and before
                                                                     adulthood, from ages 10 to l9.
Answer: Pineal
                                                                     Answer: Adolescence
Question21. The _________ located in the front part of the
lower neck, is shaped like a bow tie or butterfly and produces       Question32. Adolescence is a time of rapid change and many
the thyroid hormones thyroxine and triiodothyronine.                 challenges as young people transition from childhood to
                                                                     _________.
Answer: Thyroid
                                                                     Answer: Adulthood
Question22. The body has two triangular adrenal glands, one on
top of each _________.                                               Question33. _________ adolescence extends roughly from
                                                                     12/13 to 16 / 17 years.
Answer: Kindly
                                                                     Answer: Early
Question23. The inner part, the         _________     produces
catecholamines, such as epinephrine.                                 Question34. _________ adolescence covers the period from 17
                                                                     years to 18 / 19 years.
Answer: Adrenal medulla
                                                                     Answer: Late
Question24. The pancreas produces two important hormones,
insulin and _________.                                               Question1. What is adolescence?
Answer: Mellitus                                                     Answer: A given hormone usually affects only a limited number
                                                                     of cells, which are called target cells.
Question30. Excessive amounts of glucocorticoid hormones in
the body can lead to _________ syndrome.                             Question7. How does a target cell response to a hormone?
Answer: Endocrine glands: Question21. Which hormone stimulates the adrenal gland?
Glands that do not have tubes. They secrete hormones.                Answer: ACTH.
Example- the pituitary gland.
                                                                     Question22. Which hormone stimulates the thyroid gland?
Question9. What are exocrine glands?
                                                                     Answer: TSH.
Answer: Glands that have ducts are called exocrine glands.
They generally secrete enzymes. Example- salivary gland.             Question23. Name a hormone produced by the testes.
Answer: Endocrine responses are slow because hormones must           Question24. Which hormone helps in the regulation of blood
travel through the blood to reach their target organs.               pressure?
Question11. Name two mixed glands, other than the pancreas. Answer: Vasopressin.
Answer: Testes and ovaries are mixed glands.                         Question25. Deficiency of which hormone causes an increase in
                                                                     blood glucose level?
Question12. Which endocrine gland is situated above the
kidney?                                                              Answer: Insulin.
Answer: Adrenal (Hence it is also known as supra renal gland). Question26. Name the hormone antagonistic to insulin.
Question14. Deficiency of which hormone causes diabetes              Answer: Increase in blood glucose level.
insipid?
                                                                     Question28. Name a local hormone.
Answer: Antidiuretic hormone or ADH.
                                                                     Answer: Gastrin, secreted from the stomach.
Question15. Deficiency of which hormone causes diabetes
mellitus?                                                            Question29. Which hormone helps in milk secretion?
Question16. Which endocrine gland is considered a master             Question30. Name two steroid hormones.
gland?
                                                                     Answer: Estrogen and progesterone.
Answer: Pituitary.
                                                                     Question31. What is the other name for pituitary?
Question17. Deficiency of which hormone causes cretinism?
                                                                     Answer: Hypophysis.
Answer: Thyroxin.
                                                                     Question32. What causes tetany?
Question18. Deficiency of which hormone causes dwarfism?
                                                                     Answer:Tetany:
Answer: Somatotrophic hormone or STH.
                                                                     Deficiency of parathormone.
Question19. Excess of which hormone causes gigantism?
                                                                     Question33. Which endocrine gland produces gonadotrophic
Answer: Somatotrophic hormone or STH.                                hormones?
Question20. Hyper-function      of   which     hormone   causes      Answer: Anterior part of the pituitary.
exophthalmic goiter?
Page 12 of 19
Question34. Which hormone is considered an emergency                     Answer: Uncontrolled burning of crackers Excessive honking
hormone?                                                                 Drug addiction etc.
Question35. What causes pimples and acne?                                Answer: Adolescence describes the teenage years between 13
                                                                         and 19 and can be considered the transitional stage from
Answer: Hormonal changes.                                                childhood to adulthood.
Question36. State a symptom of fear.                                     However, the physical and psychological changes that occur in
                                                                         adolescence can start earlier, during the preteen years (ages 9
Answer: Palpitation.                                                     through 12)t Adolescence can be a time of both disorientation
                                                                         and discovery.
Question37. Which education helps in decision-making, critical
thinking, etc?                                                           Question2. Distinguish between the terms ‘puberty’ and
                                                                         ‘adolescence’.
Answer: Skill education.
                                                                         Answer: Distinguish      between    the   terms   ‘puberty’   and
Question38. What is emotion management?                                  ‘adolescence’:
Answer: Emotion management:                                              Puberty is the time in which a child’s sexual and physical
                                                                         characteristics mature. It occurs due to hormone changes.
Identifying our emotions and learning to express them.
                                                                         Adolescence is the period between puberty and adulthood.
Question39. Name the smallest endocrine gland of the human
                                                                         Puberty is a period of physical transition; adolescence is about a
body.
                                                                         psychological and social transition.
Answer: Pineal body is attached to the roof of the third ventricle
                                                                         Puberty is the process of physical changes by which adolescents
of the brain.
                                                                         reach sexual maturity, i.e. become capable of reproduction.
Question40. What do you mean by life skill education?
                                                                         Question3. How do hormones act in our bodies? Which of the
Answer: Life skill education is a special behavior that helps us         two has a smaller voice box: grown-up boys or grown-up girls?
to face various needs and challenges boldly.
                                                                         Answer: Most hormones circulate in the blood, coming into
Question41. Name the hormone which develops secondary                    contact with essentially all cells. However, a given hormone
sexual characteristics :                                                 usually affects only a limited number of cells, which are called
                                                                         target cells. A target cell responds to a hormone because it bears
Answer: In females (girls)- Estrogen                                     receptors for the hormone.-Estrogen and Testosterone
Question42. Which of the two has a smaller voice box: grown-             Question4. Mention a few feelings associated with adolescence.
up boys or grown-up girls?
                                                                         Answer: Fear, anger, crying, depression, offense, etc.
Answer: Grown-up girls.
                                                                         Question5. What do you mean by emotion management?
Question43.    Mention     a    few    feelings   associated   with
adolescence.                                                             Answer: Emotion management refers to controlling the
                                                                         uncontrolled expression of happiness, anger, or sorrow which
Answer: Fear, anger, crying, depression, offense, etc.                   would otherwise affect our physical and mental health.
Answer: Emotion management refers to controlling the                     Locate and give one function of the following endocrine glands
uncontrolled expression of happiness, anger, or sorrow which             in man:
would otherwise affect our physical and mental health.
                                                                         Thyroid,
Question45. Mention a few examples of risky behaviors
associated with the adolescent period.                                   Adrenal gland.
                                                                Page 13 of 19
Thyroid: Location—On either side of the upper border of the              Question10. Name a hormone secreted by each of the glands
trachea, just below the larynx.                                          adrenal, testis, and ovaries, and mention one important function
                                                                         of each of these hormones.
Function—It secretes thyroxine which increases BMR by
stimulating the metabolism of carbohydrates, fat, and protein in         Answer: Adrenaline—It increases the metabolic rate of the body.
the body.                                                                Testis—Its hormone is testosterone which causes the growth of
                                                                         accessory sex organs and the development of secondary sex
Adrenal gland: Location-On the upper pole of each kidney.                characteristics in males.
Function—It secretes corticoid and catecholamine hormones                Ovary—It’s one hormone is estrogen which causes the growth
which control the metabolism of carbohydrates, protein, fat,             of accessory sex organs and the development of secondary sex
mineral, and water and also help to fight against stress.                characteristics in females.
Question6. Name the hormones secreted by the posterior                   Question11. What is diabetes mellitus?
pituitary.
                                                                         Answer: A disorder in which the body’s cells cannot absorb
Answer: Antidiuretic hormone (ADH) or Vasopressin and                    glucose, either because the pancreas does not produce enough
Oxytocin.                                                                insulin or the cells do not respond to the effects of insulin that
                                                                         are produced in the body.
Question7. Name two hormones secreted by the anterior
pituitary gland in man.                                                  Question12. Which hormone is called emergency hormone and
                                                                         why?
Answer: ACTH or Adrenocorticotrophic hormone
                                                                         Answer: The adrenal medullary hormone adrenaline is called
TSH or Thyroid stimulating hormone.                                      emergency hormone because it helps the body to fight against
                                                                         (or to adjust to) emergency conditions by increasing circulation
Question8. 1. What is glucagon? 2. From which gland and                  and respiration along with the activity of skeletal muscles, eyes,
which cells is it secreted? 3. What is its function?                     etc.
Answer: Glucagon is a polypeptide hormone.                               Question13. Differentiate between        Exocrine Gland       and
                                                                         Endocrine Glands.
It is secreted from the pancreas gland.
                                                                         Answer:
Functions of glucagon—
anterior pituitary
posterior pituitary
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                                                               The tastes make the male sex hormones called testosterone. The
                                                               ovaries make female sex hormones called estrogen. The
                                                               production of these sex hormones is under the control of another
                                                               hormone called gonadotropic hormone (GTH) secreted by the
                                                               pituitary gland.
                                                               Answer: People are advised to use iodized salt for cooking food
                                                               so as to prevent goiter disease:
Answer:                                                        Question18. Name the hormones which are responsible for the
                                                               following symptoms:
Question19. Mention the problem associated with the                    Answer: Pituitary Gland:
adolescence stage. What are the steps of problem-solving?
                                                                       Although it is no bigger than a pea, the pituitary gland, located
Answer: The problems of the adolescence stage are:                     at the base of the brain just beneath the hypothalamus, is
                                                                       considered the most important part of the endocrine system.
sex problem
                                                                       It’s often called the “master gland” because it makes hormones
emotional problem                                                      that control several other endocrine glands.
social problem including drug abuse Problem solving                    The production and secretion of pituitary hormones can be
incorporates the identification of the root cause of the problem       influenced by factors such as emotions and seasonal changes.
and searching for a suitable way to overcome it.
                                                                       To accomplish this, the hypothalamus relays information sensed
Four basic steps in problem-solving are:                               by the brain (such as environmental temperature, light exposure
                                                                       patterns, and feelings) to the pituitary.
Defining problems
                                                                       The tiny pituitary gland is divided into two lobes: the anterior
Brainstorming about alternatives                                       lobe and the posterior lobe.
Evaluating and selecting the best alternative                          The anterior lobe regulates the activity of the thyroid, adrenals,
                                                                       and reproductive glands. Among the hormones it produces are:
Implementation of solution.
                                                                       Growth hormone,
Question1. What is chemical coordination? Why are hormones
called chemical messengers? Name the hormone secreted by the           Prolactin
human heart.
                                                                       Adrenocorticotropic hormone (ACTH),
Answer: Chemical Coordination:-
                                                                       Thyroid-stimulating hormone (TSH),
The animal body has two levels of coordination: nervous
coordination and chemical coordination.                                Luteinizing hormone (LH),
Chemical coordination occurs through the endocrine system by           Follicle-stimulating hormone (FSH).
secreting hormones that stimulate or inhibit one or more
physiological processes for the welfare of the body.                   The other lobe of the pituitary gland is called the posterior
                                                                       pituitary which controls different physiological functions of the
Chemical coordination aims to maintain the balance of the              body, it produces the following two hormones:
internal chemical environment of the body. Hormones are
informational molecules that carry the message of metabolic            Oxytocin,
changes from the endocrine glands to the target cells or organs.
                                                                       Antidiuretic hormone (ADH) or vasopressin.
Hormones play a major role in maintaining the balance of the
internal chemical environment through their integrated action          The pituitary also secretes endorphins, chemicals that act on the
throughout the body.                                                   nervous system to reduce sensitivity to pain. In addition, the
                                                                       pituitary secretes hormones that signal the ovaries and testes to
These are secreted at one part of the body and then transported        make sex hormones. The pituitary gland also controls ovulation
by the blood to another part for stimulating or inhibiting one or      and the menstrual cycle in women.
more physiological processes.
                                                                       The posterior lobe of the pituitary releases antidiuretic hormone,
Since the function of the hormone is chemically at sites far away      which helps control body water balance through its effect on the
from their places of origin, they are known as chemical                kidneys and urine output; and oxytocin, which triggers the
messengers.                                                            contractions of the uterus that occur during labor.
The atria of the heart secrete the hormone called Atrial               Question3. In a tabular form mention the hormones of the
natriuretic peptide (ANP).                                             anterior pituitary, adrenal gland, and ovary and- state their
                                                                       functions.
Question2. How many lobes are there in the Pituitary gland?
Name the hormones secreted by it.                                      Answer: Read it yourself from this note.
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Question4. Write notes on gigantism and dwarfism.                       With the onset of puberty, preteens and teenagers experience
                                                                        rapid growth and changes in their bodies, develop sexually, and
Answer: Read it yourself from this note.                                become increasingly aware of their body image.
Question5. Mention the characteristic features of hormones.             Teens develop their own morals, values, and self-direction; they
What do you mean by calorigenic hormones?                               test limits and try on different points of view; they develop a
                                                                        conscience.
Answer: The general characteristics of hormones are as follows:
                                                                        Social skills continue to develop and include romantic
Hormones are secreted by ductless endocrine glands directly             relationships.
into the blood. These are never stored in any other place of the
animal or human body for future use except the secreting glands.        Teens have an increased awareness of self, which can include
                                                                        feeling self-conscious and fluctuating high or low self-esteem,
Chemically hormones are either proteins or nan proteinous in
nature.                                                                 Teens continue to develop cognitively, with an increased
                                                                        capacity for problem-solving, decision-making, and abstract
The secretion of 6f hormones Is regulated by the nervous system         thinking;
through a feedback mechanism.
                                                                        however, their thinking is still more impulsive than adults; for
Most hormones are highly soluble ‘in water ’and are conducted           example, the mere presence of peers can encourage them to
freely in the bloodstream. soluble hormones are conducted In a          engage in risky behavior.
bound state with transport protein.
                                                                        Question9. Describe the psychological and cognitive changes
Hormones can not act on the secretory cells ‘from where these           occurring during adolescence.
are secreted. They generally act at a Site remote from their place
of production after being transported through the circulatory           Answer: Changes during Adolescence:
system.
                                                                        Physical-Physical changes (e.g., growth spurt and skeletal and
Hormones are destroyed and excreted immediately after their             structural changes) are rapid and visually apparent.
functions are over. Thyroid hormones (Thyroxine and
Triiodothyronine) are known as calorigenic hormones because             Considerable diversity in physical developmental rates occurs
they increase oxygen uptake and tissue metabolism of the                due to genetics, environmental factors, and health issues.
human body.
                                                                        Distinct gender differences are evident in size, strength, and age
Question6. What are the types of diabetes mellitus? Describe            of growth spurt (e.g., girls around age 12 and boys around age
them.                                                                   14).
Answer: Read this yourself from this note. Self-esteem changes due to adolescents’ home and school lives.
Question7. What is an anti-diabetic hormone? What happens               Preoccupations with the self lead to critical self-examination
due to the hyposecretion of the hormone? What is the full form          and subsequently to the formation of self-perceptions.
of ADH?
                                                                        Argumentative and aggressive behaviors become evident and
Answer: Insulin secreted from the pancreas is known as an               often disturb parents and teachers.
antidiabetic hormone. Hyposecretion of insulin leads to
Diabetes mellitus type I.                                               Psychosocial-Friendships form and social interactions increase,
                                                                        which have the potential for boosting self-esteem and reducing
It used to be called juvenile-onset diabetes because it often           anxiety.
begins in childhood. As a result movement of glucose from the
blood to the cell is hampered.                                          Distinct gender differences occur in socialization patterns (e.g.,
                                                                        females tend to have smaller numbers of close friends and males
The person becomes weak. The functional power of the kidney,            tend to have larger “social networks”).
heart, and eye is reduced. ADH stands for Antidiurectic
hormone.                                                                Allegiance and affiliation shift from parents and teachers to
                                                                        friends and peers.
Question8. Write about some of the normal changes going on
for teens.                                                              Social tasks and situations are handled without adult supervision
                                                                        and advice.
Answer: Some of the normal changes going on for teens:
                                                               Page 17 of 19
Cognitive-Higher levels of cognitive functioning                (e.g.,     The denial of this desire often makes them discontented and
reasoning and higher-level thought processes) develop.                     restless. Drug addiction is a major social problem during
                                                                           adolescence.
Moral and ethical choices are now possible and often guide
behavior.                                                                  Drugs are powerful chemicals that when taken into the body
                                                                           change the functions of the body, influence the mind, and
Development diversity leads to varying abilities to think and              therefore, sometimes even change the behavior of the person.
reason.
                                                                           Adolescent boys and girls should avoid drugs to maintain
Cognitive ability is often affected by overall socialization.              physical, mental and social well-being which are necessary to
                                                                           live a purposeful, fruitful, and satisfying life in this world. Thus,
Perspectives about past, present and future developments that              a number of social problems disturb adolescents.
allow enhanced perspectives of time.
                                                                           Question11. Describe the various aspects of life skill education.
Language and overall verbalization skills increase, allowing
improved communication in both school and home situations.                 Answer: Various aspects of life skill education:
Question10. Write briefly about the problems of the                        The various aspects of life skill education are as follows:
adolescence stage.
                                                                           “Self-awareness c A person needs to identify his/her likes,
Answer: Problems of Adolescence Stage:                                     dislikes, success, and failures and learn to control them,
                                                                           effectively.
The problems of adolescence may be summarized in the
following manner:                                                          Critical thinking involves proper analysis of problems and
                                                                           behavior.
1. Sex Problems- We have read that all the aspects of
adolescent development are basically conditioned by physical               Decision makingiProper decision needs to be taken by
changes. The onset of puberty gives the physical excitement                overcoming the confused thinking pattern.
never experienced before.
                                                                           Creative thinking: A person should participate in various
The adolescent reacting to these experiences is excited, often             creative arts like drama, painting, song, or other cultural
without realizing what is happening to him. Some react with                activities to gain gradual control over emotions.
pleasure or excitement and some others experience shame,
disgust, confusion, anxiety, and guilt. They may lead to sexual            Problem-solving: It encompasses quick identification of the root
maladjustment.                                                             cause of the problem and its solution.
2. Emotional Problem- Heightened emotionality is a major                   Interpersonal communication: A person has to be a patient
problem of adolescence. Adolescents experience excessive                   listener. Simultaneously a person should also learn to speak and
emotion and they do not have sufficient control over violence.             communicate properly.
Excitability and anger may find expression in their destructive            Interpersonal relationship: It is important to make good and
form and may lead to law and order problems. The emotion of                healthy relationships with family members and friends to
love, suspicion, jealousy, frustration, and revengefulness is very         balance personal and working life.
common among adolescents. Thus emotional immaturity is a
major problem in adolescence.                                              Empathy: It is important to treat others’ problems as own one
                                                                           after a proper .. understanding of others’ feelings.
3. Social Problem- Every society has its own customs and
traditions, which it wants to maintain. Every individual has to            Stress management: Areas of mental pressure need to be
follow these social values but often adolescents think all these           identified and suitable measures …. should be practiced to
are outdated and they are not willing to obey                              reduce them.
This leads to conflicts. Physical development has many social              Emotion management: It is necessary to control the uncontrolled
implications. Sexual development necessarily includes                      expressions of happiness, anger, or sorrow that would otherwise
heterosexual orientation and they want to take part in social              affect somebody’s health and increase unnecessary mental stress.
activities with the opposite sex.
                                                                           Question12. Why pancreas or pancreatic gland is called mixed
                                                                           gland?
                                                                           Answer:
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Answer:
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