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ATI LPN · Anatomy and Physiology · Questions About the Nervous System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The nurse asks a client to stick out the tongue. The nurse is testing the function of what cranial nerve?

A. III

B. VI

C. IX

D. XII

Expert Explanatory Rationale

Correct Answer: XII

Question 2 of 5

The cervical plexus is formed by the spinal nerves from which spinal levels?

A. C1 to C4

B. C5 to C8

C. C1 to C8

D. C7 to T1

Expert Explanatory Rationale

Correct Answer: C1 to C4

Question 3 of 5

The largest of the paravertebral ganglia, which carries sympathetic impulses to the eye, salivary glands, and mucosa of the mouth, is the:

A. superior cervical

B. celiac

C. superior mesenteric

D. stellate

Expert Explanatory Rationale

Correct Answer: superior cervical

Question 4 of 5

At a synapse, impulse conduction normally:

A. occurs in both directions

B. occurs in only one direction

C. depends on acetylcholine

D. depends on epinephrine

Expert Explanatory Rationale

Correct Answer: occurs in only one direction

Question 5 of 5

In the spinal cord:

A. Hemisection of the cord (Brown-Sequard Syndrome) results in paralysis and loss of touch and proprioception on the same side and loss of pain and temperature sensation on opposite side

B. The cord ends at L3

C. The lateral corticospinal tract is an important motor tract

D. The blood supply at each level is in danger because of poor anastomoses

Expert Explanatory Rationale

Correct Answer: Hemisection of the cord (Brown-Sequard Syndrome) results in paralysis and loss of touch and proprioception on the same side and loss of pain and temperature sensation on opposite side

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