Question 1

Which of the following structures is NOT part of the peripheral nervous system (PNS)?

Accepted Answer

Brain

Question 2

Sensory receptors can be classified by location. Which type of receptor is most likely to detect changes in blood pressure within arteries?

Accepted Answer

Interoceptor

Question 3

A patient presents with referred pain in the left arm during a heart attack. This phenomenon is best explained by:

Accepted Answer

Convergence of visceral and somatic sensory fibers in the spinal cord

Question 4

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

Accepted Answer

Endoneurium

Question 5

Which of the following is TRUE regarding the transmission of sensory information from the skin to the CNS?

Accepted Answer

Sensory neurons transmit impulses from receptors to the spinal cord

Question 6

The femoral nerve innervates which of the following muscle groups?

Accepted Answer

Quadriceps

Question 7

Which nerve is responsible for innervating the skin over the lateral forearm?

Accepted Answer

Musculocutaneous nerve

Question 8

During a patellar (knee-jerk) reflex, which of the following best describes the pathway of the reflex arc?

Accepted Answer

Sensory neuron → motor neuron

Question 9

If the axillary nerve is damaged, which function would most likely be impaired?

Accepted Answer

Abduction of the arm at the shoulder

Question 10

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

Accepted Answer

Encapsulated receptors have a connective tissue capsule surrounding the nerve ending

Question 11

A patient cannot flex their fingers and has numbness in the lateral palm. Which nerve is most likely affected?

Accepted Answer

Median nerve

Question 12

Which spinal nerve plexus gives rise to the sciatic nerve?

Accepted Answer

Sacral plexus

Question 13

Which of the following is a function of the pudendal nerve?

Accepted Answer

Controls muscles of the perineum

Question 14

Which of the following reflexes is used to test the integrity of the spinal cord at the L4 level?

Accepted Answer

Patellar (knee-jerk) reflex

Question 15

If a patient has loss of sensation in the medial side of the hand and difficulty with finger abduction, which nerve is most likely damaged?

Accepted Answer

Ulnar nerve

Question 16

Which equation best represents the relationship between stimulus intensity and action potential frequency in a sensory neuron?

Accepted Answer

$$f = k 	imes I$$

Question 17

Which of the following best describes the function of the perineurium in a nerve?

Accepted Answer

Surrounds bundles (fascicles) of axons

Question 18

A patient presents with inability to dorsiflex the foot and numbness over the anterior leg. Which nerve is most likely affected?

Accepted Answer

Common fibular (peroneal) nerve

Question 19

Which of the following is TRUE regarding the plantar reflex?

Accepted Answer

A positive Babinski sign in adults may indicate CNS damage

Question 20

Which of the following best describes the function of the abdominal reflex?

Accepted Answer

Tests the integrity of the thoracic spinal cord

Peripheral Nervous System and Reflex Activity: Chapter 13 Study Guide

Study Guide - Practice Questions