Question 1

Which of the following best describes the function of the dorsal root ganglion in the spinal cord?

Accepted Answer

It contains the cell bodies of sensory neurons.

Question 2

A patient presents with loss of sensation in the fingers. Which nerve plexus is most likely affected?

Accepted Answer

Brachial plexus

Question 3

Which cranial nerve is responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Cranial nerve II (Optic)

Question 4

If the receptive fields of neurons in a region of skin are very small, what is the expected effect on sensory discrimination?

Accepted Answer

Sensory discrimination in that area would be very fine.

Question 5

Which of the following is an example of referred pain?

Accepted Answer

Pain from heart dysfunction is felt in the left arm.

Question 6

Which nerve connects the brain to the enteric (gut) nervous system?

Accepted Answer

Vagus nerve

Question 7

Which of the following cranial nerves is involved in both sensory and motor functions?

Accepted Answer

Trigeminal nerve

Question 8

A patient has difficulty shrugging their shoulders. Which cranial nerve is most likely damaged?

Accepted Answer

Cranial nerve XI (Accessory)

Question 9

Which of the following is a monosynaptic reflex arc?

Accepted Answer

Stretch reflex

Question 10

During conscious movements, lower motor neurons receive signals from:

Accepted Answer

Upper motor neurons in the motor cortex

Question 11

Which pathway is primarily responsible for conscious voluntary movements?

Accepted Answer

Pyramidal tract

Question 12

Which of the following best describes the pathway involved in the withdrawal reflex?

Accepted Answer

Nociceptor - spinal cord - motor neurons

Question 13

Which of the following is true regarding the sympathetic and parasympathetic nervous systems?

Accepted Answer

They are always both active to a greater or lesser extent.

Question 14

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

Accepted Answer

Stimulates the diaphragm

Question 15

Which receptor type is responsible for the sensation of vibration?

Accepted Answer

Pacinian corpuscles

Question 16

A patient is unable to move their tongue properly. Which cranial nerve is most likely affected?

Accepted Answer

Cranial nerve XII (Hypoglossal)

Question 17

Which of the following is an example of sensory transduction?

Accepted Answer

Light striking rods and cones in the retina causes action potentials in retinal neurons.

Question 18

Which of the following best describes the output divisions of the autonomic nervous system (ANS)?

Accepted Answer

Sympathetic and parasympathetic

Question 19

Which of the following would be the result if the dorsal roots of the spinal cord were damaged?

Accepted Answer

Loss of sensory input from the affected area

Question 20

In the flexor reflex, a painful stimulus causes you to:

Accepted Answer

Pull your limb away

Anatomy & Physiology: Nervous System and Reflexes Study Guide

Study Guide - Practice Questions