Question 1

Which of the following best describes the main function of the Peripheral Nervous System (PNS)?

Accepted Answer

It sends information to the CNS and carries out actions by connecting sensory receptors, nerves, and ganglia outside the CNS.

Question 2

A person touches a hot stove and quickly pulls their hand away. Which sequence correctly describes the flow of information in this reflex?

Accepted Answer

PNS (afferent) → CNS → PNS (efferent) → muscle

Question 3

Which of the following structures is found in the afferent division of the PNS?

Accepted Answer

Sensory receptors

Question 4

Which of the following actions does NOT require the use of the peripheral nervous system?

Accepted Answer

Thinking about the answer to this problem

Question 5

What is the primary role of efferent nerves in the PNS?

Accepted Answer

To transmit signals from the CNS to effectors such as muscles and glands

Question 6

Which of the following best illustrates the concept of a reflex arc as organized in the PNS?

Accepted Answer

A muscle contracting automatically in response to a sudden stretch

Question 7

If a patient has damage to their sensory receptors in the PNS, which function would most likely be impaired?

Accepted Answer

Detection of external stimuli such as temperature or pressure

Question 8

Which of the following is a correct statement about the organization of the PNS?

Accepted Answer

The PNS includes both sensory and motor pathways.

Question 9

A patient is unable to feel pain in their hand but can still move it. Which part of the PNS is most likely damaged?

Accepted Answer

Sensory receptors

Question 10

Which of the following best describes the difference between afferent and efferent nerves in the PNS?

Accepted Answer

Afferent nerves carry signals toward the CNS, while efferent nerves carry signals away from the CNS.

Question 11

Which of the following is an example of proprioception as organized in the PNS?

Accepted Answer

Knowing the position of your arm without looking at it

Question 12

Which of the following best explains why the PNS is essential for reflex actions?

Accepted Answer

The PNS transmits sensory input to the CNS and carries motor output to effectors, enabling rapid responses.

Question 13

A person steps on a sharp object and immediately withdraws their foot. Which pathway is primarily responsible for this response?

Accepted Answer

Afferent nerves → CNS → Efferent nerves

Question 14

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

Accepted Answer

Brain

Question 15

Which of the following best describes the function of ganglia in the PNS?

Accepted Answer

They are clusters of neuron cell bodies that process and relay information.

Introduction to the Peripheral Nervous System (PNS)

Study Guide - Practice Questions