Nervous System Question Paper

Section A: Multiple Choice Questions (MCQ) - 100 Questions

1. How many pairs of cranial nerves are there? a) 10 pairs b) 12 pairs c) 14 pairs d) 16 pairs

2. Sensory nerves carry signals from: a) Brain to muscles b) Sense organs to brain c) Muscles to brain d) Brain to glands

3. The main part of a neuron containing the nucleus is called: a) Axon b) Dendrite c) Cell body d) Synapse

4. How many pairs of spinal nerves are there? a) 29 pairs b) 31 pairs c) 33 pairs d) 35 pairs

5. Motor nerves carry signals from: a) Sense organs to brain b) Brain to muscles and glands c) Muscles to brain d) One neuron to another

6. Mixed nerves contain: a) Only sensory fibers b) Only motor fibers c) Both sensory and motor fibers d) Neither sensory nor motor fibers

7. The control center of the nervous system is: a) Spinal cord b) Brain c) Cranial nerves d) Spinal nerves

8. Branch-like extensions that receive signals from other neurons are called: a) Axons b) Cell bodies c) Dendrites d) Receptors

9. A reflex action is: a) Voluntary movement b) Involuntary and nearly instantaneous movement c) Slow response d) Conscious decision

10. The long projection that carries signals away from the cell body is: a) Dendrite b) Axon c) Cell body d) Nucleus

11. Cranial nerves emerge directly from: a) Spinal cord b) Brain c) Muscles d) Sense organs

12. The spinal cord extends from the medulla oblongata to: a) Cervical region b) Thoracic region c) Lumbar region d) Sacral region

13. A stimulus is: a) A response to an event b) A thing that evokes a reaction c) A nerve signal d) A muscle contraction

14. An organ that responds to external stimuli and transmits signals is a: a) Effector b) Receptor c) Motor neuron d) Sensory neuron

15. The signal transmitted along a nerve fiber is called: a) Stimulus b) Response c) Impulse d) Reflex

16. An effector is: a) A stimulus detector b) An organ that acts in response to a stimulus c) A nerve fiber d) A brain region

17. Which is an example of reflex action? a) Writing b) Reading c) Blinking when something comes close to eye d) Speaking

18. The CNS consists of: a) Brain only b) Spinal cord only c) Brain and spinal cord d) All nerves

19. Withdrawing hand from hot object is an example of: a) Voluntary action b) Reflex action c) Motor action d) Sensory action

20. The reaction to a stimulus is called: a) Impulse b) Response c) Receptor d) Effector

21. Spinal nerves emerge from: a) Brain b) Spinal cord c) Muscles d) Sense organs

22. The nervous system's main function is: a) Digestion b) Circulation c) Control and coordination d) Respiration

23. A neuron is: a) A muscle cell b) A nerve cell c) A blood cell d) A bone cell

24. The space between two neurons is called: a) Gap junction b) Synapse c) Axon terminal d) Node

25. Sensory neurons are also called: a) Motor neurons b) Afferent neurons c) Efferent neurons d) Interneurons

26. Motor neurons are also called: a) Sensory neurons b) Afferent neurons c) Efferent neurons d) Receptor neurons

27. The protective covering around the brain is: a) Skull b) Meninges c) Vertebrae d) Cartilage

28. The basic unit of nervous system is: a) Brain b) Nerve c) Neuron d) Synapse

29. Reflexes help in: a) Conscious thinking b) Protection from harm c) Voluntary movements d) Memory formation

30. The part of brain that controls reflexes is: a) Cerebrum b) Cerebellum c) Medulla oblongata d) Hypothalamus

31. Nerve impulses are: a) Chemical signals b) Electrical signals c) Both electrical and chemical d) Mechanical signals

32. The myelin sheath around axons helps in: a) Slowing impulses b) Speeding up impulses c) Stopping impulses d) Creating impulses

33. Which type of nerve fiber is myelinated? a) All nerve fibers b) Only sensory fibers c) Only motor fibers d) Long nerve fibers

34. The direction of nerve impulse in a neuron is: a) Dendrite to axon b) Axon to dendrite c) Cell body to dendrite d) Random

35. Neurotransmitters are released at: a) Cell body b) Dendrites c) Axon terminals d) Nucleus

36. The autonomic nervous system controls: a) Voluntary actions b) Involuntary actions c) Reflexes only d) Sensory functions

37. The somatic nervous system controls: a) Involuntary actions b) Voluntary actions c) Heart rate d) Digestion

38. Pain receptors are called: a) Photoreceptors b) Mechanoreceptors c) Nociceptors d) Chemoreceptors

39. Temperature receptors are called: a) Thermoreceptors b) Photoreceptors c) Chemoreceptors d) Mechanoreceptors

40. Light receptors are called: a) Thermoreceptors b) Photoreceptors c) Chemoreceptors d) Mechanoreceptors

41. The knee-jerk reflex involves: a) Brain processing b) Spinal cord only c) Voluntary control d) Conscious thought

42. Gray matter in spinal cord contains: a) Myelinated axons b) Cell bodies c) Blood vessels only d) Cerebrospinal fluid

43. White matter in spinal cord contains: a) Cell bodies b) Myelinated axons c) Gray matter d) Blood only

44. The reflex arc involves: a) 3 components b) 4 components c) 5 components d) 6 components

45. In a reflex arc, the correct sequence is: a) Effector→Receptor→CNS b) Receptor→CNS→Effector c) CNS→Receptor→Effector d) Receptor→Effector→CNS

46. The fastest type of nerve fiber is: a) Unmyelinated b) Thinly myelinated c) Thickly myelinated d) All are same speed

47. Sensory receptors convert stimuli into: a) Mechanical energy b) Chemical energy c) Electrical impulses d) Heat energy

48. The peripheral nervous system includes: a) Brain only b) Spinal cord only c) Brain and spinal cord d) All nerves outside CNS

49. Cranial nerve I is: a) Optic nerve b) Olfactory nerve c) Auditory nerve d) Trigeminal nerve

50. The vagus nerve is cranial nerve: a) VIII b) IX c) X d) XI

51. The optic nerve is cranial nerve: a) I b) II c) III d) IV

52. Facial expressions are controlled by cranial nerve: a) V b) VI c) VII d) VIII

53. The trigeminal nerve is cranial nerve: a) III b) IV c) V d) VI

54. Hearing and balance are controlled by cranial nerve: a) VII b) VIII c) IX d) X

55. The spinal cord is protected by: a) Skull b) Ribs c) Vertebral column d) Sternum

56. Cerebrospinal fluid is found in: a) Blood vessels b) Ventricles and subarachnoid space c) Muscles d) Bones

57. The blood-brain barrier protects: a) Heart b) Lungs c) Brain d) Liver

58. Neurons communicate through: a) Direct contact b) Chemical messengers c) Electrical connection d) All of the above

59. The resting potential of a neuron is approximately: a) $+70\text{mV}$ b) $-70\text{mV}$ c) $0\text{mV}$ d) $+35\text{mV}$

60. Action potential is: a) Resting state b) Active state c) Damaged state d) Dead state

61. Saltatory conduction occurs in: a) Unmyelinated fibers b) Myelinated fibers c) All fibers d) Damaged fibers

62. Nodes of Ranvier are found in: a) Cell bodies b) Dendrites c) Myelinated axons d) Synapses

63. The refractory period prevents: a) Impulse generation b) Backward flow of impulse c) Forward flow of impulse d) Synapse formation

64. Excitatory neurotransmitters: a) Inhibit nerve impulses b) Promote nerve impulses c) Block nerve impulses d) Have no effect

65. Inhibitory neurotransmitters: a) Promote nerve impulses b) Inhibit nerve impulses c) Speed up impulses d) Create new impulses

66. Acetylcholine is a: a) Hormone b) Enzyme c) Neurotransmitter d) Receptor

67. The neuromuscular junction is between: a) Two neurons b) Neuron and muscle c) Two muscles d) Muscle and bone

68. Muscle contraction is initiated by: a) Hormones b) Nerve impulses c) Blood flow d) Oxygen

69. The sympathetic nervous system: a) Slows heart rate b) Increases heart rate c) Has no effect on heart d) Stops the heart

70. The parasympathetic nervous system: a) Increases heart rate b) Slows heart rate c) Stops digestion d) Increases breathing

71. Fight or flight response is controlled by: a) Parasympathetic system b) Sympathetic system c) Somatic system d) Central system

72. Rest and digest response is controlled by: a) Sympathetic system b) Parasympathetic system c) Somatic system d) Sensory system

73. Reflex actions are important for: a) Learning b) Memory c) Survival d) Growth

74. The simplest reflex involves: a) 2 neurons b) 3 neurons c) 4 neurons d) 5 neurons

75. Conditioned reflexes are: a) Inborn b) Learned c) Automatic d) Unconscious

76. Unconditioned reflexes are: a) Learned b) Inborn c) Voluntary d) Conscious

77. The pupillary reflex controls: a) Eye movement b) Pupil size c) Blinking d) Focusing

78. The patellar reflex tests: a) Arm function b) Leg function c) Spinal cord function d) Brain function

79. Withdrawal reflex is: a) Protective b) Harmful c) Voluntary d) Learned

80. Reflexes can be: a) Only spinal b) Only cranial c) Both spinal and cranial d) Neither

81. The stretch reflex maintains: a) Blood pressure b) Muscle tone c) Heart rate d) Breathing

82. Golgi tendon organs detect: a) Muscle length b) Muscle tension c) Muscle temperature d) Muscle color

83. Muscle spindles detect: a) Muscle tension b) Muscle length c) Muscle strength d) Muscle fatigue

84. Proprioceptors provide information about: a) External environment b) Body position c) Temperature d) Pain

85. The vestibular system controls: a) Vision b) Hearing c) Balance d) Taste

86. Sensory adaptation means: a) Increased sensitivity b) Decreased sensitivity c) No change d) Loss of function

87. Phantom limb sensation occurs due to: a) Damaged receptors b) Brain interpretation c) Muscle memory d) Blood circulation

88. Cross-over of nerve fibers occurs at: a) Spinal cord b) Medulla oblongata c) Cerebrum d) Cerebellum

89. The left brain controls: a) Left side of body b) Right side of body c) Both sides equally d) No specific side

90. Nerve regeneration is possible in: a) CNS only b) PNS only c) Both CNS and PNS d) Neither CNS nor PNS

91. Wallerian degeneration occurs in: a) Healthy nerves b) Damaged nerves c) Growing nerves d) All nerves

92. Schwann cells are found in: a) CNS b) PNS c) Both CNS and PNS d) Neither

93. Oligodendrocytes are found in: a) PNS b) CNS c) Both CNS and PNS d) Neither

94. The largest cranial nerve is: a) Optic b) Trigeminal c) Vagus d) Facial

95. Bell's palsy affects: a) Trigeminal nerve b) Facial nerve c) Optic nerve d) Auditory nerve

96. Carpal tunnel syndrome affects: a) Ulnar nerve b) Radial nerve c) Median nerve d) All arm nerves

97. Sciatica involves: a) Femoral nerve b) Sciatic nerve c) Tibial nerve d) All leg nerves

98. Multiple sclerosis affects: a) Myelin sheath b) Cell bodies c) Dendrites d) Synapses

99. Parkinson's disease involves: a) Excess dopamine b) Lack of dopamine c) Excess acetylcholine d) Lack of serotonin

100. Alzheimer's disease primarily affects: a) Spinal cord b) Peripheral nerves c) Brain d) Muscles

Section B: One Mark Short Questions - 100 Questions

1. Define sensory nerves.

2. What are motor nerves?

3. How many cranial nerves are there?

4. Name the main parts of a motor neuron.

5. What is the function of dendrites?

6. What does CNS stand for?

7. Define reflex action.

8. What is a stimulus?

9. Give one example of reflex action.

10. What is an impulse?

11. Define receptor.

12. What is an effector?

13. How many spinal nerves are there?

14. What are mixed nerves?

15. Name the two main parts of CNS.

16. What is the function of axon?

17. Where do cranial nerves emerge from?

18. What is a response?

19. Give another example of reflex action.

20. What contains the nucleus in a neuron?

21. What is the control center of nervous system?

22. From where do spinal nerves emerge?

23. What type of fibers do mixed nerves contain?

24. What is the basic unit of nervous system?

25. Name the protective covering of brain.

26. What is myelin sheath?

27. What are neurotransmitters?

28. Define synapse.

29. What is autonomic nervous system?

30. What is somatic nervous system?

31. Name the pain receptors.

32. What are thermoreceptors?

33. What detects light?

34. What is gray matter?

35. What is white matter?

36. How many components are in reflex arc?

37. What is resting potential?

38. What is action potential?

39. What are nodes of Ranvier?

40. Name one excitatory neurotransmitter.

41. What is neuromuscular junction?

42. Which system controls fight or flight?

43. What is withdrawal reflex?

44. What do muscle spindles detect?

45. What system controls balance?

46. What is sensory adaptation?

47. Where does crossover occur?

48. What are Schwann cells?

49. Name the largest cranial nerve.

50. What is Bell's palsy?

51. What is the direction of impulse in neuron?

52. What is saltatory conduction?

53. What is refractory period?

54. Name one inhibitory neurotransmitter.

55. What initiates muscle contraction?

56. Which system slows heart rate?

57. What are conditioned reflexes?

58. What is pupillary reflex?

59. What is stretch reflex?

60. What do Golgi tendon organs detect?

61. What are proprioceptors?

62. What is phantom limb sensation?

63. Which side does left brain control?

64. What is Wallerian degeneration?

65. Where are oligodendrocytes found?

66. What does carpal tunnel syndrome affect?

67. What nerve is involved in sciatica?

68. What does multiple sclerosis affect?

69. What is lacking in Parkinson's disease?

70. What does Alzheimer's primarily affect?

71. What is the function of cerebrospinal fluid?

72. What protects the brain from toxins?

73. What is the speed of nerve impulse?

74. What type of neuron carries signals to muscles?

75. What type of neuron carries signals from senses?

76. What connects two neurons?

77. What covers long nerve fibers?

78. What releases neurotransmitters?

79. What receives neurotransmitters?

80. What type of response is blinking?

81. What protects spinal cord?

82. What fluid surrounds brain and spinal cord?

83. What is the charge inside resting neuron?

84. What happens during action potential?

85. What speeds up nerve conduction?

86. What prevents backward flow of impulse?

87. What type of junction is between nerve and muscle?

88. What controls involuntary actions?

89. What controls voluntary actions?

90. What is the simplest nervous pathway?

91. What type of reflex is knee-jerk?

92. What detects muscle stretch?

93. What maintains muscle tone?

94. What provides body position sense?

95. What causes adaptation in receptors?

96. What helps in nerve regeneration?

97. What cells make myelin in PNS?

98. What cells make myelin in CNS?

99. What is affected in nerve damage?

100. What is neural plasticity?

Section C: Two Marks Questions - 50 Questions

1. Differentiate between sensory and motor nerves.

2. Explain the structure of a motor neuron with a labeled diagram.

3. List the components of Central Nervous System and their functions.

4. Define reflex action and give two examples.

5. Explain the difference between cranial and spinal nerves.

6. What are mixed nerves? Give their significance.

7. Describe the basic terms related to reflex action.

8. Compare voluntary and involuntary actions.

9. Explain the pathway of a simple reflex arc.

10. What is the importance of reflex actions in daily life?

11. Describe the structure and function of dendrites.

12. Explain the role of axon in nerve impulse transmission.

13. What is the significance of cell body in a neuron?

14. Differentiate between CNS and PNS.

15. Describe any two cranial nerves and their functions.

16. Explain the protective mechanisms of the nervous system.

17. What happens when you touch a hot object? Explain the reflex.

18. Describe the components involved in blinking reflex.

19. Explain the concept of stimulus and response with examples.

20. What are the different types of neurons? Explain briefly.

21. Describe the structure of a typical nerve.

22. Explain the importance of myelin sheath.

23. What is a synapse? Describe its structure.

24. Differentiate between excitatory and inhibitory neurons.

25. Explain the process of nerve impulse transmission.

26. What are neurotransmitters? Give examples.

27. Describe the autonomic nervous system.

28. Explain the somatic nervous system.

29. What are the different types of sensory receptors?

30. Describe the reflex arc with suitable examples.

31. Explain the concept of sensory adaptation.

32. What is the role of spinal cord in reflexes?

33. Describe the structure of spinal cord.

34. Explain the difference between gray and white matter.

35. What are the characteristics of nerve impulse?

36. Describe the resting and action potential.

37. Explain saltatory conduction.

38. What is the refractory period? Why is it important?

39. Describe the neuromuscular junction.

40. Explain the sympathetic nervous system.

41. Describe the parasympathetic nervous system.

42. What are conditioned and unconditioned reflexes?

43. Explain the stretch reflex mechanism.

44. Describe the withdrawal reflex.

45. What is the role of proprioceptors?

46. Explain the vestibular system.

47. Describe nerve regeneration process.

48. What are the common nervous system disorders?

49. Explain the concept of neural plasticity.

50. Describe the blood-brain barrier and its functions.

Section D: Three Marks Broad Questions - 50 Questions

1. Draw a well-labeled diagram of a motor neuron and explain the function of each part in detail.

2. Describe the classification of the nervous system with a flowchart. Explain the functions of each division.

3. Explain the mechanism of reflex action with the help of a labeled diagram. Use the example of withdrawal of hand from a hot object.

4. Compare and contrast the Central Nervous System and Peripheral Nervous System in terms of structure, location, and functions.

5. Describe the structure and functions of cranial nerves. Explain any three cranial nerves with their specific functions.

6. Explain the concept of nerve impulse transmission. Describe the events that occur during the generation and propagation of an action potential.

7. What are synapses? Describe the structure of a synapse and explain the mechanism of synaptic transmission.

8. Describe the autonomic nervous system. Explain the differences between sympathetic and parasympathetic divisions with examples.

9. Explain the different types of sensory receptors with examples. How do they convert stimuli into nerve impulses?

10. Describe the structure of the spinal cord. Explain its role in reflex actions and as a pathway for nerve impulses.

11. What is myelin sheath? Explain its structure, formation, and significance in nerve impulse conduction.

12. Describe the process of nerve regeneration. What factors affect the regeneration of damaged nerves?

13. Explain the concept of neurotransmitters. Describe their classification and functions with specific examples.

14. What are reflexes? Classify different types of reflexes and explain their importance in maintaining homeostasis.

15. Describe the mechanism of muscle contraction as controlled by the nervous system. Include the role of motor neurons and neuromuscular junction.

16. Explain the sensory pathways in the nervous system. Describe how sensory information travels from receptors to the brain.

17. What is neural plasticity? Explain its types and significance in learning, memory, and recovery from brain injuries.

18. Describe the protective mechanisms of the nervous system including meninges, cerebrospinal fluid, and blood-brain barrier.

19. Explain the development of the nervous system. Describe the major stages of neurogenesis and neural development.

20. What are the common disorders of the nervous system? Describe the causes, symptoms, and effects of any three neurological disorders.

21. Describe the electrical properties of neurons. Explain resting potential, action potential, and the factors that influence them.

22. Explain the concept of sensory adaptation. Why is it important and how does it occur at the cellular level?

23. Describe the pain pathway in the nervous system. Explain how pain signals are transmitted, processed, and modulated.

24. What is the role of the nervous system in maintaining homeostasis? Provide specific examples of homeostatic control mechanisms.

25. Explain the integration function of the nervous system. How does the nervous system process and integrate multiple inputs?

26. Describe the motor pathways in the nervous system. Explain how voluntary movements are initiated and controlled.

27. What are the effects of aging on the nervous system? Describe the structural and functional changes that occur with age.

28. Explain the relationship between the nervous system and the endocrine system. How do they work together to control body functions?

29. Describe the sleep-wake cycle and its neural control mechanisms. What brain regions and neurotransmitters are involved?

30. What is the role of the nervous system in behavior and emotions? Explain the neural basis of behavior with examples.

31. Describe the memory formation and storage mechanisms in the nervous system. What are the different types of memory?

32. Explain the neural control of respiration. Describe the respiratory centers and their regulation mechanisms.

33. What is the neural control of heart rate and blood pressure? Describe the cardiovascular control centers and their functions.

34. Explain the neural control of digestion. Describe the enteric nervous system and its relationship with the CNS.

35. What are neurodegenerative diseases? Describe the pathophysiology of Alzheimer's disease and Parkinson's disease.

36. Describe the neural basis of vision. Explain the pathway from photoreceptors to visual cortex.

37. Explain the neural basis of hearing. Describe the auditory pathway from cochlea to auditory cortex.

38. What is the neural control of movement? Describe the motor cortex, basal ganglia, and cerebellum in motor control.

39. Explain the concept of lateralization in the brain. What are the functional differences between left and right hemispheres?

40. Describe the limbic system and its functions. How does it control emotions and motivation?

41. What is the blood-brain barrier? Explain its structure, functions, and clinical significance.

42. Describe the glial cells and their functions. How do they support neuronal function?

43. Explain the concept of neuroplasticity in learning and memory. How do synapses change during learning?

44. What are the effects of drugs on the nervous system? Describe the mechanisms of action of common psychoactive drugs.

45. Describe the neural control of temperature regulation. How does the body maintain thermal homeostasis?

46. Explain the neural mechanisms of stress response. What is the role of the hypothalamic-pituitary-adrenal axis?

47. What is the neural basis of consciousness? Describe the current theories about consciousness and awareness.

48. Describe the neural control of circadian rhythms. What is the role of the suprachiasmatic nucleus?

49. Explain the neural mechanisms of addiction. How do addictive substances affect the reward pathways in the brain?

50. What are the applications of neuroscience in medicine? Describe modern techniques for studying and treating nervous system disorders.

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Nervous System - Answer Key