Question 1

Which of the following best describes the main function of sensory receptors in the nervous system?

Accepted Answer

They detect stimuli like light, sound, touch, temperature, and chemicals.

Question 2

A patient suffers damage to the myelin sheath of their neurons. Which cell type is most likely affected in the peripheral nervous system, and what is its role in axon repair?

Accepted Answer

Schwann cells; they produce myelin and assist in axon regeneration.

Question 3

Which equation correctly represents the movement of ions during the depolarization phase of an action potential?

Accepted Answer

$$I = g_{Na^+} (V - E_{Na^+})$$

Question 4

Which of the following is NOT a function of the hypothalamus?

Accepted Answer

Initiation of voluntary muscle movement.

Question 5

A patient is unable to distinguish between sweet and bitter tastes. Which structure is most likely affected?

Accepted Answer

Taste buds on the tongue

Question 6

Which of the following best explains the concept of saltatory conduction?

Accepted Answer

Action potentials jump from one node of Ranvier to the next, increasing conduction speed.

Question 7

Which of the following is TRUE regarding the blood-brain barrier?

Accepted Answer

It protects the brain from harmful substances and pathogens.

Question 8

Which cranial nerve is responsible for carrying sensory information from the retina to the brain?

Accepted Answer

Optic nerve

Question 9

A person with multiple sclerosis (MS) experiences muscle weakness and loss of coordination. What is the underlying cause?

Accepted Answer

Loss of myelin produced by oligodendrocytes in the CNS.

Question 10

Which of the following best describes the difference between the central nervous system (CNS) and the peripheral nervous system (PNS)?

Accepted Answer

CNS consists of the brain and spinal cord; PNS consists of all nerves outside the CNS.

Question 11

Which neurotransmitter is primarily associated with Parkinson's disease due to its deficiency in the brain?

Accepted Answer

Dopamine

Question 12

Which of the following structures is responsible for maintaining equilibrium and balance in the human body?

Accepted Answer

Vestibular apparatus

Question 13

During an action potential, which event occurs first?

Accepted Answer

Depolarization due to $$Na^+$$ influx

Question 14

Which of the following is a correct sequence for the layers of the meninges from outermost to innermost?

Accepted Answer

Dura mater, arachnoid mater, pia mater

Question 15

Which equation best represents the relationship between the speed of nerve conduction and the diameter of the axon?

Accepted Answer

$$v \propto d$$

Question 16

Which of the following statements about the autonomic nervous system is correct?

Accepted Answer

The sympathetic branch prepares the body for 'fight or flight' responses.

Question 17

Which structure in the eye is responsible for focusing light onto the retina and changes shape for near and far vision?

Accepted Answer

Lens

Question 18

Which of the following best describes the function of the spinal cord?

Accepted Answer

It relays messages between the brain and body and controls reflexes.

Question 19

Which of the following is TRUE about the difference between preganglionic and postganglionic neurons in the autonomic nervous system?

Accepted Answer

Preganglionic neurons release acetylcholine in both branches.

Question 20

Which of the following is a function of cerebrospinal fluid (CSF)?

Accepted Answer

It provides nutrients and removes waste from the brain and spinal cord.

Comprehensive Study Guide: Nervous System and Related Physiology

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