CONTROL AND COORDINATION

QUESTION BANK
SECTION 1 – MCQ (I MARK)
1. In humans, the life processes are controlled and regulated by
(A) Reproductive System and endocrine systems (B) Respiratory System and nervous systems
(C) Endocrine System and digestive systems (D) Nervous System and endocrine systems
2. Nerves throughout the body other than Brain and spinal cord form ___.
A) CNS B) PNS C) ANS D) AAS
3. The growth of pollen tubes towards ovules is due to____.
A) hydrotropism B) phototropism C) chemotropism D) geotropism
4. Which of the following endocrine glands is unpaired?
(A) Adrenal (B) Testes (C) Pituitary (D) Ovary
5. Learning is related to
A. Hypothalamus B. Thalamus C. Cerebellum D. Cerebrum
6. In reflex action, the reflex arc is formed by
a. Muscles - receptor – brain b. Muscles - effector – brain
c. Receptor - spinal cord – muscles d. Spinal cord - receptor – muscles
7. Which of the following statements are true about brain?
i. The main thinking part of brain is hind brain.
ii. Centers of hearing, smell, memory, sight etc. are located in fore brain.
iii. Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind
brain.
iv. Cerebellum does not control posture and balance of the body.
A. (i) and (ii) B. (i), (ii) and (iii) C. (ii) and (iii) D. (iii) and (iv)
8. Damage of cerebellum will mostly affect the career of:
A) architect B) teacher C) librarian D) athlete
9. The nervous system is divided into the ____and the ___; the former consists of ___ and the latter
consists of _____.
A) CNS, PNS, the brain and spinal cord; nerves around the body
B) CNS, PNS, the nerves around the body; the ventricles
C) ANS, PNS, the nerves around the body; the ventricles
D) ANS, CNS, the nerves around the body; the brain and spinal cord
10. The substance that triggers the fall of mature leaves and fruits from plants is due to
A. Auxin B. Gibberellins C. Cytokinin D. Abscisic acid
11. Which of the following statements is correct about receptors?
A. Gustatory receptors detect taste while olfactory receptors detect smell
B. Both gustatory and olfactory receptors detect smell
C. Auditory receptors detect smell and olfactory receptors detect taste
D. Olfactory receptors detect taste and gustatory receptors smell
12. The plant hormone which is essential for cell division is
(A) Ethylene (B) Auxin (C) Gibberellin (D) Cytokinin
13. Electrical impulse travels in neuron from:
a. Dendrite→axon→axon end→cell body b. Cell body→Dendrite→axon→axon end
c. Dendrite→cell body→axon→axon end d. Axon end→axon→cell body→Dendrite
14. The gap between two neurons is known as ___.
(A) synapse (B) synopsis (C) impulse (D) synaptic node
15. Artifical ripening of fruit is carried out by
(A) Auxins (B) Ethylene (C) Abscisic acid (ABA) (D) Gibberellins
16. The substance that accelerates the growth in the stem is ____.
A. auxin B. cytokinin C. enzyme D. vitamin
17. Chemical messengers secreted by ductless glands are called___________
A) Lymph B) Platelets C) Plasma D) Hormones
18.________ are also known as ductless gland
A. Salivary gland B. Endocrine gland C. Exocrine gland D. Both B & C
19. The endocrine gland also known master glands ______.
A. hypothalamus B. pituitary C. pancreas D. adrenal
20. Growth hormone is produced in ___________.
A. hypothalamus B. pituitary C. pancreas D. thyroid
21. An example of a sex hormone is _________________.
A. testosterone B. Insulin C. Thyroxin D. thymosin
22. Cerebellum is situated in ___________.
A. fore brain B. mid brain C. hind brain D. partly in A and B each
23. Dwarfism results due to _____.
A) Excess secretion of thyroxin B) Less secretion of growth hormone
C) Less secretion of adrenaline D) Excess secretion of growth hormone
24. A doctor advised a person to take an injection of insulin because——-.
A) His blood pressure was low B) His heart was beating slowly
C) He was suffering from goiter D) His sugar level in blood was high
25. The gland that plays a role in fight or flight response is _________________.
A. pancreas B. pituitary C. adrenal D. thyroid
26. Unconditioned reflex is controlled by the ______________.
A. Brain B. spinal cord C. both a and b D. the autonomic nervous system
27.The box enclosing the brain is called the _____________.
A. Skull B. Head C. Cranium D. vertebral column
28. In a synapse, chemical signal is transmitted from
(A) dendritic end of one neuron to axonal end of another neuron
(B) axon to cell body of the same neuron
(C) cell body to axonal end of the same neuron
(D) axonal end of one neuron to dendritic end of another neuron
29. Spinal cord originates from
(A) cerebrum (B) medulla (C) pons (D) cerebellum
30. Iodine is necessary for the synthesis of which hormone?
(A) Adrenaline (B) Thyroxin (C) Auxin (D) Insulin
SECTION 2 – AR TYPE QUESTIONS
Following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions
selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
1. Assertion (A): Animals can react to stimuli in different ways.
Reason (R): All animals have a nervous system and an endocrine system involving hormones.
2. Assertion (A): The brain is also known as the central nervous system.
Reason (R): Central nervous system controls and regulates the voluntary actions.
3. Assertion (A): Phototropism is a directional growth movement.
Reason (R): It occurs in the direction of light
4. Assertion (A): Plants lack a nervous system, but they do coordinate.
Reason (R): It is so because of hormones
5. Assertion (A): impulse travels from dendrite to cell body and then along the axon to its end.
Reason (R): information acquired at the end of the dendrite tip of a nerve cell sets of an electric impulse.
6. Assertion (A): A growing plant appears to bend towards the direction of light
Reason (R): The plant hormone auxin diffuses towards the shady side of the root.
7. Assertion (A): A neuron transmit messages in both the direction.
Reason (R): The response is slow and produced by all cells of target tissue.
8. Assertion (A): The effect of auxin hormone on the growth of root is exactly opposite to that on a stem.
Reason (R): Auxin hormone increases the rate of growth in root and decreases the rate of growth in stem
9. Assertion (A): A receptor is a specialized group of cells in a sense organ that perceive a particular type of
stimulus.
Reason (R): Different sense organs have different receptors for detecting stimuli.
10. Assertion (A): The use of iodised salt prevents risk of goitre.
Reason (R): Iodised salt provides iodine needed by thyroid gland to make sufficient thyroxin for our
body.
SECTION 3 – VERY SHORT QUESTIONS (2 MARKS)
1. Name, the two main organs of our central nervous system. Which one of them plays a major role in
sending command to muscles to act without involving thinking process? Name the phenomenon involved.
2. Write the name and functions of any two parts of the human hind-brain.
3. What is synapse? In a neuron cell how is an electrical impulse created and what is the role of synapse in
this context?
4. Which organ secretes a hormone when blood sugar rises in our body? Name the hormone and name one
enzyme released by this organ.
5. Why are some patients of diabetes treated by giving injections of insulin?
6. How does a touch – me – not plant respond on touching? What is this movement called?
7. Why is it advised to use iodised salt in our diet?
8. (a) Which plant hormone is present in greater concentration in the areas of rapid cell division?
(b) Give one example of a plant growth promoter and a plant growth inhibitor.
9. (a) Distinguish between voluntary and involuntary actions of our body.
(b) Choose involuntary actions, amongst the following:
Reading, beating of heart, Salivation in the mouth on viewing tasty food, talking.
10. Explain the cause of shoots of the plant bending towards light?
SECTION 4 – SHORT QUESTIONS (3 MARKS)
1. (a) Draw the structure of neuron and label its part. (b) Name the part of neuron:
(i) Where information is acquired (ii) Through which information travels as an electrical impulse.
2. Write one example each of the following tropic movements:
(i) Positive phototropism (ii) Negative phototropism (iii) Positive geotropism
(iv) Negative geotropism (v) Hydrotropism (vi) Chemotropism
3. What is chemotropism? Give one example. Name any two plant hormones and mention their functions.
4. What is ‘hydrotropism’? Describe an experiment to demonstrate ‘hydrotropism’.
5. List the components of reflex arc in correct sequence. State in brief the role of brain in reflex action.