Control and Coordination in Human
Human Nervous System Human Endocrine
System (Glands)
Hypothalamus
Pituitary
Central Peripheral Autonomic Thyroid
Nervous Nervous Nervous
System System Parathyroid
System
Thymus
Pancreas
Brain Spinal Cranial Spinal Sympathetic Para Adrenal
cord Nerves Nerves Sympathetic
Ovaries
Testes
Fore Mid Hind
Brain Brain Brain
Cerebellum Pons Medulla
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Control and Co-ordination in Plants
Plant Hormones
Movements
(Phytohormones)
Growth Promoters Growth Natic Tropic
Inhibitor Movement Movement
Auxin Gibberelin Cytokinin
Abscisic Acid
Hydro Geotropism Phototropism Chemotropism Thigmotropism
tropism
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Thigmoreceptors
Dendrite
Neuromuscular
junction
Axon
Capillary
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( )
(
)
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(Nastic Movement)
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Phototropism : Movement towards light, e.g. growth of a shoot towards
light.
Geotropism : Movement towards/away form gravity, e.g. growth of
roots in soil
Chemotropism : Movement to/away Chemicals Growth of pollen tube
towards ovule.
Hydrotropism : Movement towards water. e.g. growth of a roots towards
water
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6. Releasing Hormone Hypothalmus Mid brain Stimulates pituitary
gland to release
hormones
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Very Short Answer Type Questions (1 Mark)
3. Spinal cord originates from-
(a) Cerebrum (b) Medulla
(c) Pons (d) Cerebellum
4. The movement of shoot towards light is
(a) Geotropism (b) hydrotropism
(c) Chemotropism (d) Phototropism
5. Choose the incorrect statement about insulin
(a) It is produced from pancreas
(b) It regulates growth and development of the body
(c) It regulates blood-sugar level
(d) Insufficient secretion of insulin will cause diabetes
6. Which phytohormone is responsible for wilting of leaves-
(a) Auxin (b) Abscisic acid
(c) Cytokinin (d) Gibberellin
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7. Which of the following is not an effect produced after secretion of
adrenalin into the blood-
(a) Blood supply to the digestive system & skin is reduced
(b) Heart beats faster
(c) Breathing rate increses
(d) Blood supply to skeletal muscles is reduced
8. Which part of the brain is responsible for involuntary actions like
blood-pressure, vomitting etc.
(a) Pons (b) Cerebrum
(c) Medulla (d) Cerebellum
9. Dwarfism results due to
(a) Less secretion of growth hormone
(b) Less secretion of adrenaline
(c) Excess secretion of growth hormone
(d) Less secretion of thyroxin
10. Which of the follownig endocrine glans is unpaired-
(a) Adrenal (b) Testes
(c) Pituitary (d) Ovary
Answer :
1. (a) 2. (c) 3. (b) 4. (d) 5. (b)
6. (b) 7. (d) 8. (c) 9. (a) 10. (c)
11.
12. em.
13.
14.
15.
16.
17.
18.
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19.
20.
21.
22.
23.
24. In following questions two statements are given one labelled Assertion
(a) and the other labelled Reason (R). Select the correct answer to these
questions from the codes (a), (b), (c) and (d) as given below:
(a) Both A and R are true, and R is correct explanation of the assertion.
(b) Both A and R are true, but R is not the correct explanation of the
assertion.
(c) A is true, but R is false.
(d) A is false, but R is true.
I. Asseration : It is imporatant to have iodised salt in our diet.
Reason: Iodine is necessary for thyroid gland to make thyroxin
hormone.
II. Asseration : Reflex arcs have evolved in animals
Reason: The thinking process of the brain is not fast enough.
III. Asseration : The brain sits inside a bony box
Reason: Brain, a delicate organ, is very important for organisms.
IV. Asseration : Auxin helps the cells of stem grow longer
Reason: Auxin is a growth inhibitor.
V. Asseration : The hormones should be secreted in precise quantities
Reason: Feedback mectranism operates in body to control hormone
secretion
Answer:
1. (a) 2. (a) 3. (a) 4. (c) 5. (a)
Case-Study
25. Read the following and answer the questions:
The nervous tissue is made up of an organised network of nerve cells or
neurons and is specialized for conducting information via electrical
impulses from one part of the body to another.
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1. Which part of the neuron acquires the information
(a) Dendrite (b) Cell body
(c) Axon (d) Nerve ending
2. Junction between two neurons is called
(a) Cell junction (b) Neuro-muscular junction
(c) Neural joint (d) Synapse
3. Identify the diagram
(a) Neural joint
(b) Neuro-muscular junction
(c) Cell junction
(d) None of the above
4. In a neuron, conversion of electrical signal
to a chemical signal occurs at/in
(a) Cell body (b) Axonal end
(c) Dendritic end (d) None of the above
5. The neurons that carry signals from spinal cord to muscles are
(a) Sensory neuron (b) Motor neuron
(c) Relay neuron (d) None of the above
Answer:
1. (a) 2. (d) 3. (b) 4. (b) 5. (b)
SHORT ANSWER TYPE QUESTIONS (2 AND 3 Marks)
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8. List two different functions performed by pancreas (CBSE-2019)
9.
10.
12.
13
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