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Study Material for Class 10 Science Chapter 7 Control and Coordination
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Class 10 Science Chapter 7 Control and Coordination
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CONTROL AND COORDNATION
1. Drastic changes of body features associated with puberty are mainly because of secretion of
a. Estrogen from testes and testosterone from ovary
b. Estrogen from adrenal gland and testosterone from pituitary gland
c. Testosterone from testes and estrogen from ovary
d. Testosterone from thyroid gland and estrogen from pituitary gland
2. Learning is related to
a. Hypothalamus
b. Thalamus
c. Cerebrum
d. Cerebellum
3. Which of the following statements about transmission of nerve impulse is incorrect?
a. Nerve impulse travels from dendritic end towards axonal end
b. At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron
c. The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron
d. A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells
4. Which of the following organs is not controlled by autonomous nervous system ?
a. Heart
b. Uterus
c. Glands
d. Eyes
5. The substance that triggers the fall of mature leaves and fruits from plants is due to
a. Auxin
b. Gibberellins
c. Abscissic acid
d. Cytokinin
6. The typical neuronal resting membrane potential measures between
a. 40 mv to – 80 mv
b. 30 mv to – 80 mv
c. 40 mv to – 90 mv
d. 40 mv to – 70 mv
7. The growth of tendril in pea plants is due to
a. Effect of light
b. Effect of gravity
c. Rapid cell divisions in tendiillar cells that are away from the support
d. Rapid cell divisions in tendrillar cells in contact with the support
8. 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
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)
10. 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
11. Which two organs are connected by pons with the help of transverse band of nerves?
a. Nerves of brain and spinal cord
b. Both the cerebral hemispheres
c. Cerebellum and central nervous system
d. Sympathetic and parasympathetic
12. 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
13. The plant hormone which is essential for cell division is
(a) Ethylene
(b) Auxin
(c) Gibberellin
(d) Cytokinin
14. The activities of the internal organs are controlled by the
(a) Central Nervous System
(b) Peripheral Nervous System
(c) Autonomic Nervous System
(d) None of these
15. The seat of intelligence and voluntary action in the brain is
(a) Diencephalon
(b) Cerebrum
(c) Cerebellum
(d) Medulla Oblongata
16. The gap between two neurons is known as ___.
(a) synapse
(b) synopsis
(c) impulse
(d) synaptic node
17. Which of the following is a plant hormone?
(a) Thyroxin
(b) Cytokinin
(c) Insulin
(d) Oestrogen
18. Tropic movements are
(a) in response to light
(b) in response to gravity
(c) uni-directional
(d) non-directional
19. Artifical ripening of fruit is carried out by
(a) Auxins
(b) Ethylene
(c) Abscisic acid (ABA)
(d) Gibberellins
20. Part of brain that controls respiration, heartbeat and peristalsis is ____.
(a) Cerebrum
(b) Cerebellum
(c) Pons
(d) Medulla
21. The brain is responsible for
(a) thinking.
(b) regulating the heart beat.
(c) balancing the body.
(d) all of the above.
22. Which of the following hormone is released by thyroid?
(a) Insulin
(b) Thyroxin
(c) Trypsin
(d) Pepsin
23. Which body organ is surrounded by meninges?
(a) Heart and Lungs
(b) Brain & Heart
(c) Brain and Spinal Cord
(d) Spinal Cord and Lungs
24. Part of brain that controls muscular co-ordination is ____.
(a) Cerebrum
(b) Cerebellum
(c) Pons
(d) Medulla
25. Growth of the stem is controlled by
(a) gibberellin
(b) auxin
(c) abscisic acid
(d) cytokinin
26. Wilting of leaves is caused by which hormone?
(a) gibberellin
(b) auxin
(c) abscisic acid
(d) cytokinin
27. Which of the following hormones contains iodine?
(a) adrenaline
(b) testosterone
(c) thyroxine
(d) insulin
28. Which part of brain controls the posture and balance of the body?
(a) Cerebrum
(b) Cerebellum
(c) Pons
(d) Medulla
29. Fill in the blanks.
(a) _____ is the is the structural and functional unit of the nervous system.
(b) An automatic response to a stimulus which is not controlled by the brain is called ______.
(c) Chemical messengers which control and coordinate in plants and animals are called _____.
(d) The movement of a plant part in the direction of light is called ____.
(e) ________ is the movement of plant part in response to the availability of water.
(f) ________ is the movement of plant part in response to the pull of earth’s gravity
(g) The movement of plant part in response to certain chemicals is called ______.
(h) _________ is the reflex centre of the brain.
(i) __________ is a structure associated with both nervous system and endocrine system.
30. List the functions of testosterone and estrogen.
31. Write name of three hormones secreted by the pituitary gland.
32. Nervous and hormonal system together perform the function of control and coordination in human beings. Justify the statement.
33. What is hydrotropism?
34. What is coordination?
35. Why is the response of a plant to a stimulus not observed immediately?
36. What are hormones?
37. What are phytohormones?
38. What are meanings? What are their functions? Name the fluid, which is filled in between meanings.
39. How does control and coordination occur in single-celled animals?
40. Name any two phytohormones, which are growth promoters.
41. Name any growth inhibiting phytohormone.
42. What makes a stem bend towards sunlight?
43. What is the difference between a reflex action and walking?
44. Why is a system of control and coordination essential in living organisms?
45. What happens at the synapse between two neurons?
46. Which part of the brain maintains posture and equilibrium of the body?
47. How do we detect the smell of an agarbatti (incense stick)?
48. List the functions performed by Cerebrum.
49. Which is the largest and most prominent part of the brain.
50. What are the functions of cerebellum?
51. How brain is protected inside a human body?
52. What is the role of the brain in reflex action?
53. What do you mean by reflex action? Give examples of reflex actions?
54. What are the different types of reflexes?
55. What is reflex arc?
56. What are plant hormones?
57. Who coined the term phytohormones?
58. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
59. Write differences between nastic and tropic movements
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