Question 1

Which of the following best describes the main components of the peripheral nervous system (PNS)?

Accepted Answer

Cranial nerves and spinal nerves

Question 2

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

Accepted Answer

Musculocutaneous nerve

Question 3

Which of the following is a correct classification of sensory receptors by stimulus type?

Accepted Answer

Nociceptors detect tissue damage and pain

Question 4

Which connective tissue layer directly surrounds individual nerve fibers (axons) within a nerve?

Accepted Answer

Endoneurium

Question 5

A patient has difficulty extending their wrist and fingers after a humeral shaft fracture. Which nerve is most likely injured?

Accepted Answer

Radial nerve

Question 6

Which of the following best explains the phenomenon of referred pain?

Accepted Answer

Pain signals from visceral organs are perceived as originating from the skin due to shared neural pathways

Question 7

Which of the following is the correct order of a reflex arc?

Accepted Answer

Receptor → Sensory neuron → Integration center → Motor neuron → Effector

Question 8

Which spinal nerve plexus gives rise to the femoral nerve?

Accepted Answer

Lumbar plexus

Question 9

If a patient cannot dorsiflex their foot and has numbness over the dorsum of the foot, which nerve is most likely damaged?

Accepted Answer

Common fibular (peroneal) nerve

Question 10

Which of the following best describes the function of the phrenic nerve?

Accepted Answer

Innervates the diaphragm for breathing

Question 11

Which of the following is TRUE regarding the plantar reflex?

Accepted Answer

A positive Babinski sign in infants is normal

Question 12

Which nerve innervates most of the anterior thigh muscles and is responsible for knee extension?

Accepted Answer

Femoral nerve

Question 13

Which of the following best describes the difference between encapsulated and non-encapsulated sensory receptors?

Accepted Answer

Encapsulated receptors have a connective tissue capsule and are often mechanoreceptors

Question 14

A patient presents with loss of sensation in the medial hand and difficulty with finger abduction. Which nerve is most likely affected?

Accepted Answer

Ulnar nerve

Question 15

Which of the following is NOT a function of the spinal cord?

Accepted Answer

Initiating voluntary movement

Question 16

Which nerve is responsible for innervating the deltoid muscle and providing sensation to the skin over the shoulder?

Accepted Answer

Axillary nerve

Question 17

Which of the following best describes the integration center in a reflex arc?

Accepted Answer

May be the spinal cord or brain, where sensory information is processed

Question 18

Which nerve is most likely to be damaged in carpal tunnel syndrome, resulting in numbness and tingling in the lateral three and a half fingers?

Accepted Answer

Median nerve

Question 19

Which of the following is a monosynaptic reflex?

Accepted Answer

Stretch (patellar) reflex

Question 20

Which nerve innervates the skin over the lateral forearm and the biceps brachii muscle?

Accepted Answer

Musculocutaneous nerve

Peripheral Nervous System and Reflex Activity: Study Guide Notes

Study Guide - Practice Questions