Question 1

Which of the following best describes the function of the Golgi tendon organ in proprioception?

Accepted Answer

It monitors tension generated by muscle contraction to prevent muscle damage.

Question 2

A patient presents with loss of sensation in the lateral forearm and weakness in elbow flexion. Which nerve is most likely affected?

Accepted Answer

Musculocutaneous nerve

Question 3

Which cranial nerve is responsible for transmitting auditory and equilibrium information to the brain?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 4

During a routine neurological exam, a patient is unable to abduct their right eye. Which cranial nerve is most likely damaged?

Accepted Answer

Abducens nerve (VI)

Question 5

Which of the following best describes a monosynaptic reflex arc?

Accepted Answer

A reflex arc involving only one synapse between a sensory and a motor neuron.

Question 6

A person steps on a sharp object and immediately withdraws their foot while the opposite leg extends to support the body. Which reflexes are involved?

Accepted Answer

Flexion (withdrawal) reflex and crossed-extension reflex

Question 7

Which structure contains the cell bodies of sensory neurons entering the spinal cord?

Accepted Answer

Posterior root ganglion

Question 8

Which of the following best explains why referred pain occurs?

Accepted Answer

Visceral and somatic sensory neurons converge on the same spinal interneurons.

Question 9

Which nerve is the primary motor and sensory nerve of the diaphragm, and what would be the consequence of its bilateral damage?

Accepted Answer

Phrenic nerve; respiratory arrest

Question 10

A patient has numbness in the thumb, index, and middle fingers, and difficulty with thumb opposition. Which nerve is most likely compressed?

Accepted Answer

Median nerve

Question 11

Which of the following best describes the function of rapidly adapting receptors?

Accepted Answer

They detect changes in stimulus intensity but quickly stop responding to constant stimuli.

Question 12

Which of the following is TRUE regarding the organization of the peripheral nervous system (PNS)?

Accepted Answer

The motor (efferent) division includes both somatic and autonomic components.

Question 13

Which of the following best describes the role of the epineurium?

Accepted Answer

It is the outermost connective tissue layer surrounding an entire nerve.

Question 14

A patient is unable to shrug their shoulders or turn their head against resistance. Which cranial nerve is most likely damaged?

Accepted Answer

Accessory nerve (XI)

Question 15

Which of the following best describes the function of a mechanoreceptor?

Accepted Answer

It responds to mechanical stimuli such as pressure, vibration, or stretch.

Question 16

Which of the following is a mixed cranial nerve involved in both facial expression and taste sensation from the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (VII)

Question 17

Which of the following best describes the pathway of a simple stretch reflex?

Accepted Answer

A sensory neuron synapses directly with a motor neuron in the spinal cord.

Question 18

Which of the following best explains the function of the primary somatosensory cortex (S1)?

Accepted Answer

It processes and interprets sensory information from the body.

Question 19

A patient presents with loss of sensation in the skin over the lateral leg and dorsum of the foot, and weakness in foot dorsiflexion. Which nerve is most likely affected?

Accepted Answer

Common fibular (peroneal) nerve

Question 20

Which of the following best describes the function of a pseudounipolar neuron in the peripheral nervous system?

Accepted Answer

It carries sensory information from the periphery to the CNS with a single process that splits into two branches.

Peripheral Nervous System: Structure, Function, and Key Concepts

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