Multiple Choice Questions
1. Which part of the brain controls voluntary actions?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Hypothalamus
2. What is the function of sensory neurons?
a) To transmit signals from the brain to muscles
b) To transmit signals from muscles to the brain
c) To carry sensory information from receptors to the central nervous system
d) To carry motor information from the central nervous system to the effectors
3. Which hormone is known as the stress hormone?
a) Insulin
b) Adrenaline
c) Thyroxine
d) Glucagon
4. What does the central nervous system consist of?
a) Brain and spinal cord
b) Brain and nerves
c) Spinal cord and nerves
d) Brain only
5. Which of the following is a plant hormone responsible for cell division?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Abscisic acid
6. Which type of neuron carries impulses from the sense organs to the brain?
a) Sensory neuron
b) Motor neuron
c) Interneuron
d) Efferent neuron
7. What is the function of the cerebellum?
a) Controls voluntary actions
b) Coordinates muscular activities
c) Regulates temperature
d) Controls heartbeat
8. Which gland secretes the hormone insulin?
a) Adrenal
b) Thyroid
c) Pituitary
d) Pancreas
9. What is the role of the medulla in the brain?
a) Memory storage
b) Reflex actions
c) Involuntary actions like breathing and heartbeat
d) Voluntary muscle movement
10. What is the basic unit of the nervous system?
a) Brain
b) Neuron
c) Nerve
d) Spinal cord
11. Which plant hormone is responsible for ripening of fruits?
a) Auxin
b) Gibberellin
c) Ethylene
d) Abscisic acid
12. What does the peripheral nervous system include?
a) Brain and spinal cord
b) Cranial nerves and spinal nerves
c) Only brain
d) Only spinal cord
13. What is the term used for directional movement of a plant part in response to light?
a) Geotropism
b) Hydrotropism
c) Phototropism
d) Thigmotropism
14. Which hormone is involved in the regulation of metabolism?
a) Adrenaline
b) Thyroxine
c) Insulin
d) Growth hormone
15. What is the main function of the sympathetic nervous system?
a) Calms the body after stress
b) Prepares the body for 'fight or flight'
c) Regulates digestion
d) Controls voluntary muscles
16. In plants, what is the role of abscisic acid?
a) Promotes growth
b) Promotes seed dormancy and closing of stomata
c) Promotes flowering
d) Promotes fruit ripening
17. Which part of the brain is associated with emotions?
a) Cerebrum
b) Medulla
c) Hypothalamus
d) Cerebellum
18. What type of neuron is involved in reflex actions?
a) Sensory neuron only
b) Motor neuron only
c) Interneuron only
d) Sensory, motor, and interneurons
19. What is the function of the spinal cord?
a) Controls involuntary actions
b) Transmits signals between the brain and the rest of the body
c) Controls emotions
d) Coordinates balance
20. Which hormone is known as the "growth hormone"?
a) Adrenaline
b) Insulin
c) Thyroxine
d) Somatotropin
21. What triggers the closing of stomata in plants?
a) High light intensity
b) Presence of abscisic acid
c) High humidity
d) Low carbon dioxide levels
22. Which hormone regulates the sleep-wake cycle in humans?
a) Melatonin
b) Serotonin
c) Dopamine
d) Adrenaline
23. What is the function of the pituitary gland?
a) Produces adrenaline
b) Regulates metabolism
c) Acts as a master gland controlling other glands
d) Controls blood sugar levels
24. What type of movement is shown by a plant in response to touch?
a) Phototropism
b) Geotropism
c) Thigmotropism
d) Hydrotropism
25. Which part of the neuron receives signals from other neurons?
a) Axon
b) Dendrite
c) Synapse
d) Myelin sheath
26. Which of the following is not a plant hormone?
a) Auxin
b) Insulin
c) Gibberellin
d) Ethylene
27. What is the role of myelin sheath in neurons?
a) Produces neurotransmitters
b) Protects and insulates the nerve fiber
c) Stores energy
d) Transmits nerve impulses
28. What is geotropism?
a) Movement in response to light
b) Movement in response to gravity
c) Movement in response to touch
d) Movement in response to water
29. What part of the brain is responsible for regulating hunger and thirst?
a) Cerebellum
b) Cerebrum
c) Medulla
d) Hypothalamus
30. Which part of the eye regulates the amount of light entering it?
a) Lens
b) Retina
c) Cornea
d) Iris
31. What is the primary function of neurotransmitters?
a) To protect neurons
b) To transmit electrical signals
c) To communicate chemical signals between neurons
d) To store energy in neurons
32. Which gland is located at the base of the brain?
a) Thyroid
b) Adrenal
c) Pituitary
d) Pancreas
33. Which part of the brain is involved in the control of respiration?
a) Medulla
b) Cerebrum
c) Cerebellum
d) Hypothalamus
34. What is the role of gibberellin in plants?
a) Promotes fruit ripening
b) Inhibits growth
c) Stimulates stem elongation and seed germination
d) Causes leaf fall
35. Which type of muscle is controlled by the autonomic nervous system?
a) Skeletal muscles
b) Cardiac muscles
c) Voluntary muscles
d) Smooth muscles
36. What is the main function of the parasympathetic nervous system?
a) Increases heart rate
b) Stimulates digestion and calms the body
c) Prepares the body for emergencies
d) Controls voluntary movements
37. Which plant hormone helps in the phototropism response?
a) Cytokinin
b) Auxin
c) Abscisic acid
d) Gibberellin
38. What are the sensory receptors for smell called?
a) Gustatory receptors
b) Olfactory receptors
c) Photoreceptors
d) Mechanoreceptors
39. What is the function of the somatic nervous system?
a) Controls involuntary muscles
b) Regulates the internal organs
c) Controls voluntary movements and reflex actions
d) Controls emotional responses
40. What type of response is shown by the roots of a plant towards gravity?
a) Positive geotropism
b) Negative geotropism
c) Positive phototropism
d) Negative phototropism
41. Which of the following is a characteristic of a reflex action?
a) Voluntary
b) Slow
c) Conscious
d) Involuntary
42. Which part of the neuron is responsible for transmitting impulses away from the cell body?
a) Dendrite
b) Axon
c) Myelin sheath
d) Synapse
43. What is the primary function of the autonomic nervous system?
a) Controls voluntary muscles
b) Regulates involuntary functions
c) Stimulates skeletal muscles
d) Regulates thought processes
44. Which hormone controls the rate of metabolism in the body?
a) Insulin
b) Adrenaline
c) Thyroxine
d) Estrogen
45. Which structure in the plant detects the direction of light?
a) Root tip
b) Shoot tip
c) Leaf blade
d) Stem
46. Which part of the human brain controls balance and coordination?
a) Cerebrum
b) Medulla
c) Hypothalamus
d) Cerebellum
47. Which hormone is released in response to low blood sugar levels?
a) Insulin
b) Glucagon
c) Adrenaline
d) Thyroxine
48. Which of the following describes the role of the hypothalamus?
a) Controls voluntary actions
b) Regulates the release of hormones from the pituitary gland
c) Controls balance and coordination
d) Controls the heartbeat
49. Which type of plant movement is shown by the opening and closing of flowers?
a) Nastic movement
b) Phototropism
c) Geotropism
d) Hydrotropism
50. What is the role of auxins in plants?
a) Inhibit cell elongation
b) Promote cell elongation
c) Cause fruit ripening
d) Induce seed dormancy
Answers
1. a) Cerebrum
2. c) To carry sensory information from receptors to the central nervous system
3. b) Adrenaline
4. a) Brain and spinal cord
5. c) Cytokinin
6. a) Sensory neuron
7. b) Coordinates muscular activities
8. d) Pancreas
9. c) Involuntary actions like breathing and heartbeat
10. b) Neuron
11. c) Ethylene
12. b) Cranial nerves and spinal nerves
13. c) Phototropism
14. b) Thyroxine
15. b) Prepares the body for 'fight or flight'
16. b) Promotes seed dormancy and closing of stomata
17. c) Hypothalamus
18. d) Sensory, motor, and interneurons
19. b) Transmits signals between the brain and the rest of the body
20. d) Somatotropin
21. b) Presence of abscisic acid
22. a) Melatonin
23. c) Acts as a master gland controlling other glands
24. c) Thigmotropism
25. b) Dendrite
26. b) Insulin
27. b) Protects and insulates the nerve fiber
28. b) Movement in response to gravity
29. d) Hypothalamus
30. d) Iris
31. c) To communicate chemical signals between neurons
32. c) Pituitary
33. a) Medulla
34. c) Stimulates stem elongation and seed germination
35. d) Smooth muscles
36. b) Stimulates digestion and calms the body
37. b) Auxin
38. b) Olfactory receptors
39. c) Controls voluntary movements and reflex actions
40. a) Positive geotropism
41. d) Involuntary
42. b) Axon
43. b) Regulates involuntary functions
44. c) Thyroxine
45. b) Shoot tip
46. d) Cerebellum
47. b) Glucagon
48. b) Regulates the release of hormones from the pituitary gland
49. a) Nastic movement
50. b) Promote cell elongation
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