class 10 biology chapter 3 mcq

Coordination and Control—Class 10 Biology MCQs

1. The brain and spinal cord together form the:
   a) Central nervous system
   b) Peripheral nervous system
   c) Autonomic nervous system
   d) Endocrine system
   Answer: a

2. Which part of the brain controls voluntary actions?
   a) Medulla oblongata
   b) Cerebellum
   c) Cerebrum
   d) Hypothalamus
   Answer: c

3. The junction between two neurons is called:
   a) Axon
   b) Dendrite
   c) Synapse
   d) Node
   Answer: c

4. Reflex actions are controlled by the
   a) Cerebrum
   b) Spinal cord
   c) Medulla
   d) Thalamus
   Answer: b

5. Which of the following is a part of the peripheral nervous system?
   a) Brain
   b) Spinal cord
   c) Cranial nerves
   d) Medulla
   Answer: c

6. Which gland is known as the “master gland”?
   a) Adrenal
   b) Pituitary
   c) Thyroid
   d) Pancreas
   Answer: b

7. Hormones are secreted by:
   a) Exocrine glands
   b) Sensory neurons
   c) Endocrine glands
   d) Motor neurons
   Answer: c

8. Which hormone regulates blood sugar levels?
   a) Adrenaline
   b) Insulin
   c) Thyroxine
   d) Estrogen
   Answer: b

9. The main function of the cerebellum is
   a) Thinking
   b) Coordination and balance
   c) Digestion
   d) Breathing
   Answer: b

10. The peripheral nervous system consists of
    a) Brain and spinal cord
    b) Sensory and motor nerves
    c) Cerebrum and cerebellum
    d) All neurons
    Answer: b

11. Which part of the brain controls hunger and thirst?
    a) Cerebrum
    b) Cerebellum
    c) Medulla
    d) Hypothalamus
    Answer: d

12. Adrenal glands secrete:
    a) Insulin
    b) Adrenaline
    c) Thyroxine
    d) Testosterone
    Answer: b

13. Which structure carries impulses away from the cell body of a neuron?
    a) Dendrite
    b) Axon
    c) Synapse
    d) Nucleus
    Answer: b

14. Which gland controls metabolism?
    a) Pituitary
    b) Thyroid
    c) Adrenal
    d) Pineal
    Answer: b

15. Coordination in plants occurs through
    a) Nerves
    b) Hormones
    c) Reflexes
    d) Muscles
    Answer: b

16. The gap between two neurons is bridged by:
    a) Axoplasm
    b) Neurotransmitters
    c) Impulses
    d) Reflex arc
    Answer: b

17. Which hormone is involved in the fight-or-flight response?
    a) Insulin
    b) Glucagon
    c) Adrenaline
    d) Cortisol
    Answer: c

18. What is the function of sensory neurons?
    a) Carry impulses to muscles
    b) Connect sensory to motor neurons
    c) Carry impulses from receptors to CNS
    d) Secrete enzymes
    Answer: c

19. Which part of the brain controls involuntary actions like heartbeat?
    a) Medulla
    b) Cerebrum
    c) Cerebellum
    d) Thalamus
    Answer: a

20. Which plant hormone promotes cell elongation?
    a) Auxin
    b) Cytokinin
    c) Abscisic acid
    d) Ethylene
    Answer: a

21. Which neuron carries impulses from the CNS to effectors?
    a) Sensory neuron
    b) Motor neuron
    c) Relay neuron
    d) Association neuron
    Answer: b

22. Which of the following is not an endocrine gland?
    a) Pituitary
    b) Liver
    c) Adrenal
    d) Thyroid
    Answer: b

23. Movement of roots towards water is called:
    a) Geotropism
    b) Hydrotropism
    c) Phototropism
    d) Thigmotropism
    Answer: b

24. Which of the following is an example of a reflex action?
    a) Running
    b) Sneezing
    c) Reading
    d) Speaking
    Answer: b

25. The brain is protected by
    a) Rib cage
    b) Skull
    c) Vertebral column
    d) Meninges only
    Answer: b

26. Tropic movements in plants are
    a) Random
    b) Directional
    c) Involuntary and non-directional
    d) Voluntary
    Answer: b

27. The spinal cord is protected by:
    a) Skull
    b) Meninges
    c) Vertebral column
    d) Ribs
    Answer: c

28. The speed of nerve impulse is faster in:
    a) Non-myelinated axons
    b) Myelinated axons
    c) Dendrites
    d) Synapse
    Answer: b

29. The nervous system works by
    a) Hormonal transport
    b) Impulses
    c) Osmosis
    d) Blood pressure
    Answer: b

30. The part of the neuron that receives signals is
    a) Axon
    b) Synapse
    c) Dendrite
    d) Soma
    Answer: c

31. Reflex arcs are
    a) Voluntary movements
    b) Quick, automatic responses
    c) Conscious responses
    d) None of these
    Answer: b

32. Insulin is secreted by:
    a) Pituitary gland
    b) Pancreas
    c) Liver
    d) Adrenal gland
    Answer: b

33. Which hormone promotes growth in plants?
    a) Abscisic acid
    b) Auxin
    c) Cytokinin
    d) Ethylene
    Answer: b

34. Which system helps in chemical coordination?
    a) Digestive
    b) Nervous
    c) Endocrine
    d) Skeletal
    Answer: c

35. The pituitary gland is located:
    a) Below cerebrum
    b) In the neck
    c) Inside the chest
    d) Near the spinal cord
    Answer: a

36. Which of the following is a motor response?
    a) Feeling pain
    b) Seeing light
    c) Pulling hand away from heat
    d) Smelling gas
    Answer: c

37. Which hormone promotes the ripening of fruits?
    a) Cytokinin
    b) Ethylene
    c) Auxin
    d) ABA
    Answer: b

38. Involuntary actions are controlled by:
    a) Cerebrum
    b) Cerebellum
    c) Medulla oblongata
    d) Spinal cord
    Answer: c

39. Voluntary actions are under the control of
    a) Cerebrum
    b) Medulla
    c) Cerebellum
    d) Brainstem
    Answer: a

40. Plant hormones are called
    a) Neurotransmitters
    b) Enzymes
    c) Phytohormones
    d) Vitamins
    Answer: c

41. Coordination in humans is achieved by
    a) Hormones
    b) Nervous system
    c) Both A and B
    d) Skeletal system
    Answer: c

42. Which of the following coordinates muscular movements?
    a) Cerebrum
    b) Medulla
    c) Cerebellum
    d) Pons
    Answer: c

43. One function of the hypothalamus is
    a) Voluntary actions
    b) Reflex control
    c) Hunger and thirst regulation
    d) Breathing
    Answer: c

44. Which hormone helps in leaf fall and dormancy?
    a) Auxin
    b) ABA
    c) Ethylene
    d) Cytokinin
    Answer: b

45. Which part of a neuron transmits impulses?
    a) Dendrites
    b) Soma
    c) Axon
    d) Synapse
    Answer: c

46. Coordination means
    a) Reaction
    b) Regulation and adjustment
    c) Digestion
    d) Circulation
    Answer: b

47. Fight-or-flight hormone is
    a) Thyroxine
    b) Estrogen
    c) Adrenaline
    d) Insulin
    Answer: c

48. Relay neurons are present in:
    a) Effectors
    b) Brain and spinal cord
    c) Muscles
    d) Glands
    Answer: b

49. Hormones are carried by:
    a) Nerves
    b) Blood
    c) Lymph
    d) Skin
    Answer: b

50. The chemical messenger in plants is
    a) Enzyme
    b) Nerve impulse
    c) Hormone
    d) Sugar
    Answer: c

51. Which movement is a growth movement in plants?
    a) Taxis
    b) Reflex
    c) Tropism
    d) Nastic
    Answer: c

52. Which is not a function of the cerebrum?
    a) Memory
    b) Intelligence
    c) Balance
    d) Reasoning
    Answer: c

53. The automatic response to a stimulus is
    a) Tropism
    b) Reflex action
    c) Hormonal control
    d) Voluntary action
    Answer: b

54. Which hormone is responsible for elongation of cells?
    a) Cytokinin
    b) Auxin
    c) ABA
    d) Ethylene
    Answer: b

55. The message crosses the synapse by:
    a) Neurotransmitters
    b) Hormones
    c) Electric current
    d) Ions
    Answer: a

56. Pancreas has
    a) Only endocrine functions
    b) Only exocrine functions
    c) Both endocrine and exocrine functions
    d) No function
    Answer: c

57. The endocrine gland located in the neck is
    a) Adrenal
    b) Thyroid
    c) Pituitary
    d) Pineal
    Answer: b

58. Which plant hormone is an antitranspirant?
    a) Auxin
    b) Cytokinin
    c) Abscisic acid
    d) Ethylene
    Answer: c

59. The part of the brain controlling heartbeat is
    a) Cerebrum
    b) Cerebellum
    c) Medulla oblongata
    d) Spinal cord
    Answer: c

60. In humans, the speed of nerve impulse is
    a) Very slow
    b) 1 m/s
    c) 100 m/s or more
    d) Zero
    Answer: c

61. Which of the following hormones causes seed dormancy?
    a) Auxin
    b) Cytokinin
    c) Gibberellin
    d) Abscisic acid (ABA)
    Answer: d

62. Which of the following is not controlled by the hypothalamus?
    a) Hunger
    b) Thirst
    c) Blood pressure
    d) Muscle contraction
    Answer: d

63. The brain is enclosed in:
    a) Vertebral column
    b) Skull
    c) Cartilage
    d) Rib cage
    Answer: b

64. Which gland controls other endocrine glands?
    a) Adrenal
    b) Thyroid
    c) Pituitary
    d) Pancreas
    Answer: c

65. Which part of the brain controls reflexes?
    a) Medulla
    b) Cerebrum
    c) Cerebellum
    d) Pons
    Answer: a

66. Which neuron connects sensory and motor neurons?
    a) Motor neuron
    b) Relay neuron
    c) Dendrite
    d) Axon
    Answer: b

67. The response of plants to touch is called:
    a) Geotropism
    b) Hydrotropism
    c) Phototropism
    d) Thigmotropism
    Answer: d

68. Which part of the neuron contains the nucleus?
    a) Dendrite
    b) Axon
    c) Cell body
    d) Synapse
    Answer: c

69. Which hormone regulates basal metabolic rate (BMR)?
    a) Adrenaline
    b) Thyroxine
    c) Insulin
    d) Estrogen
    Answer: b

70. A nerve is made up of:
    a) Muscle fibers
    b) Axons of neurons
    c) Bones
    d) Glial cells
    Answer: b

71. Tropism is caused due to:
    a) Reflexes
    b) Environmental stimuli
    c) Hormones
    d) Genes
    Answer: b

72. Which part of the plant shows positive phototropism?
    a) Root
    b) Stem
    c) Leaf
    d) Flower
    Answer: b

73. Which part of the plant shows positive geotropism?
    a) Leaf
    b) Flower
    c) Root
    d) Stem
    Answer: c

74. Which system is faster in response?
    a) Nervous system
    b) Endocrine system
    c) Circulatory system
    d) Digestive system
    Answer: a

75. Which one of the following controls voluntary actions?
    a) Cerebellum
    b) Cerebrum
    c) Medulla
    d) Spinal cord
    Answer: b

76. The structural and functional unit of the nervous system is:
    a) Brain
    b) Nephron
    c) Neuron
    d) Nerve
    Answer: c

77. The gap between two neurons is known as:
    a) Axon
    b) Dendrite
    c) Synapse
    d) Soma
    Answer: c

78. The spinal cord originates from:
    a) Cerebrum
    b) Cerebellum
    c) Medulla
    d) Hypothalamus
    Answer: c

79. Coordination and control in multicellular organisms is achieved by:
    a) Respiration
    b) Hormones and nervous system
    c) Digestion
    d) Excretion
    Answer: b

80. Nerve impulses are:
    a) Chemical only
    b) Mechanical
    c) Electrical
    d) Electro-chemical
    Answer: d

81. Which of the following organs is not involved in coordination?
    a) Brain
    b) Spinal cord
    c) Liver
    d) Endocrine glands
    Answer: c

82. Movement in response to light is called:
    a) Geotropism
    b) Thigmotropism
    c) Chemotropism
    d) Phototropism
    Answer: d

83. Which part of the brain helps maintain posture?
    a) Cerebrum
    b) Cerebellum
    c) Medulla
    d) Hypothalamus
    Answer: b

84. Which plant hormone causes wilting?
    a) Auxin
    b) Cytokinin
    c) ABA
    d) Gibberellin
    Answer: c

85. Electrical impulses in neurons travel from:
    a) Axon to dendrite
    b) Dendrite to axon
    c) Synapse to dendrite
    d) Dendrite to cell body
    Answer: b

86. The central nervous system includes:
    a) Brain and spinal cord
    b) Nerves only
    c) Brain and nerves
    d) Spinal cord and nerves
    Answer: a

87. Which plant hormone is used to delay senescence?
    a) Ethylene
    b) ABA
    c) Cytokinin
    d) Auxin
    Answer: c

88. The part of the neuron that connects to muscles:
    a) Axon terminal
    b) Dendrite
    c) Soma
    d) Synapse
    Answer: a

89. What is the role of neurotransmitters?
    a) Stimulate hormone release
    b) Digest food
    c) Transfer signal across synapse
    d) Provide immunity
    Answer: c

90. Which one is a synthetic plant hormone?
    a) Ethylene
    b) NAA (naphthalene acetic acid)
    c) Cytokinin
    d) Auxin
    Answer: b

91. Reflex arcs are:
    a) Conscious
    b) Involuntary
    c) Controlled by cerebrum
    d) Thoughtful
    Answer: b

92. Which of these is not a hormone?
    a) Insulin
    b) Thyroxine
    c) Adrenaline
    d) Pepsin
    Answer: d

93. Which gland controls the sleep-wake cycle?
    a) Adrenal
    b) Pituitary
    c) Pineal
    d) Thyroid
    Answer: c

94. Which part of brain is responsible for intelligence?
    a) Cerebrum
    b) Medulla
    c) Cerebellum
    d) Thalamus
    Answer: a

95. Root movement toward gravity is an example of:
    a) Phototropism
    b) Thigmotropism
    c) Geotropism
    d) Hydrotropism
    Answer: c

96. Salivation on seeing food is an example of:
    a) Reflex action
    b) Voluntary action
    c) Involuntary action
    d) Conditioned reflex
    Answer: d

97. The hormone that regulates calcium in blood is:
    a) Insulin
    b) Glucagon
    c) Parathormone
    d) Thyroxine
    Answer: c

98. Neurons that detect stimuli are:
    a) Motor neurons
    b) Relay neurons
    c) Sensory neurons
    d) Interneurons
    Answer: c

99. Thigmonastic movement is shown by:
    a) Sunflower
    b) Mimosa (Touch-me-not)
    c) Banyan tree
    d) Mango tree
    Answer: b

100. Which one of the following is a plant growth hormone?
     a) Hemoglobin
     b) ATP
     c) Cytokinin
     d) Urea
     Answer: c