$$\text{Receptor} \rightarrow \text{CNS}$$

$$\text{Spinal cord} \rightarrow \text{Spinal nerve} \rightarrow \text{Effector or receptor}$$

Question 1

Which of the following best describes the primary function of the sensory division of the peripheral nervous system (PNS)?

Accepted Answer

It conveys information from sensory receptors to the central nervous system.

Question 2

Which equation best represents the flow of information in the sensory division of the PNS?

Accepted Answer

$$	ext{Receptor} ightarrow 	ext{CNS}$$

Question 3

A patient is unable to voluntarily move their arm but can still feel sensations in it. Which division of the PNS is most likely damaged?

Accepted Answer

Somatic motor division

Question 4

Which of the following is a key difference between the somatic motor and visceral motor (autonomic) divisions of the PNS?

Accepted Answer

The somatic motor division controls voluntary skeletal muscles, while the visceral motor division controls involuntary smooth and cardiac muscles.

Question 5

Which of the following best describes a peripheral nerve?

Accepted Answer

A bundle of axons, blood vessels, and connective tissue located outside the central nervous system.

Question 6

Which of the following equations best represents the pathway of a spinal nerve?

Accepted Answer

$$	ext{Spinal cord} ightarrow 	ext{Spinal nerve} ightarrow 	ext{Effector or receptor}$$

Question 7

Which of the following is TRUE regarding cranial nerves?

Accepted Answer

They originate from the brain and primarily serve the head and neck regions.

Question 8

A person is experiencing abnormal heart rate and digestion. Which division of the PNS is most likely involved?

Accepted Answer

Visceral motor (autonomic) division

Question 9

Which of the following best explains why spinal nerves are considered 'mixed nerves'?

Accepted Answer

They contain both sensory and motor fibers.

Question 10

Which of the following scenarios best illustrates the integration of sensory and motor functions in the PNS?

Accepted Answer

A person touches a hot stove and immediately withdraws their hand.

Question 11

Which of the following is NOT a function of the peripheral nervous system?

Accepted Answer

Integrating information within the brain

Question 12

Which of the following best describes the role of the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate, digestion, and respiratory rate.

Question 13

Which of the following is a correct statement about the structure of a peripheral nerve?

Accepted Answer

It is composed of multiple axons, connective tissue, and blood vessels.

Question 14

Which of the following best differentiates spinal nerves from cranial nerves?

Accepted Answer

Spinal nerves originate from the spinal cord, while cranial nerves originate from the brain.

Peripheral Nervous System: Structure and Function

Study Guide - Practice Questions