Question 1

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

Accepted Answer

To send sensory information towards the CNS and receive motor commands from the CNS.

Question 2

A patient presents with loss of sensation in the anterior 2/3 of the tongue and inability to move facial muscles. Which cranial nerve is most likely affected?

Accepted Answer

Facial nerve (VII)

Question 3

Which connective tissue layer directly surrounds each individual axon within a nerve?

Accepted Answer

Endoneurium

Question 4

Which of the following is NOT a functional classification of nerves in the PNS?

Accepted Answer

Spinal

Question 5

A person is unable to shrug their shoulders or turn their head side to side. Which cranial nerve is most likely damaged?

Accepted Answer

Accessory nerve (XI)

Question 6

Which of the following statements about spinal nerves is FALSE?

Accepted Answer

They only arise from thoracic vertebrae.

Question 7

The dorsal root of a spinal nerve contains:

Accepted Answer

Sensory neuron axons

Question 8

Which cranial nerve is responsible for hearing and equilibrium?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 9

Which of the following nerves is the longest cranial nerve and innervates structures outside the head and neck?

Accepted Answer

Vagus nerve (X)

Question 10

Which nerve plexus contains the phrenic nerve, which is essential for breathing?

Accepted Answer

Cervical plexus

Question 11

A patient has difficulty swallowing and loss of taste sensation from the posterior 1/3 of the tongue. Which cranial nerve is most likely affected?

Accepted Answer

Glossopharyngeal nerve (IX)

Question 12

Which of the following best describes a nerve fiber?

Accepted Answer

A long axon

Question 13

Which of the following cranial nerves is classified as a purely sensory nerve?

Accepted Answer

Olfactory nerve (I)

Question 14

Which of the following is TRUE regarding the organization of a nerve?

Accepted Answer

The epineurium surrounds the entire nerve.

Question 15

Which of the following is NOT true of cranial nerve V?

Accepted Answer

It sends motor commands to the pharyngeal muscles for swallowing.

Question 16

Which spinal nerve plexus is responsible for innervating the muscles and skin of the upper limb?

Accepted Answer

Brachial plexus

Question 17

Which of the following best describes the difference between a nerve and a neuron?

Accepted Answer

A neuron is a single cell, while a nerve is a bundle of axons.

Question 18

Which of the following cranial nerves is responsible for movement of the tongue?

Accepted Answer

Hypoglossal nerve (XII)

Question 19

Which of the following statements about the sciatic nerve is TRUE?

Accepted Answer

It is the longest nerve in the body.

Question 20

Which of the following best describes the flow of information in the nervous system?

Accepted Answer

Sensory input is sent to the CNS, which integrates the information and sends motor output to effectors.

Pns 1

Study Guide - Practice Questions

Study Guide - Flashcards