ATI RN
Questions About the Nervous System Questions
Question 1 of 5
The largest of the paravertebral ganglia, which carries sympathetic impulses to the eye, salivary glands, and mucosa of the mouth, is the:
Correct Answer: A
Rationale: The superior cervical ganglion supplies sympathetic innervation to the head (eye, salivary glands, mucosa). Celiac and mesenteric serve abdominal organs, stellate is lower.
Question 2 of 5
The cranial nerve with the greatest distribution is the:
Correct Answer: B
Rationale: The vagus nerve (X) has the widest distribution, innervating thorax and abdomen. Trigeminal is facial, abducens is eye-specific.
Question 3 of 5
Which of the following is not a plexus of the spinal nerves?
Correct Answer: C
Rationale: Choroid is not a spinal nerve plexus (it’s a CSF-producing structure). Cervical, sacral, brachial, and lumbar are plexuses.
Question 4 of 5
At a synapse, impulse conduction normally:
Correct Answer: B
Rationale: Synaptic transmission is unidirectional (presynaptic to postsynaptic) due to vesicle release and receptor orientation. Neurotransmitters like acetylcholine or epinephrine may be involved but aren’t sole determinants.
Question 5 of 5
During repolarization of the neuronal membrane:
Correct Answer: C
Rationale: Repolarization occurs when potassium (K⁺) exits via voltage-gated channels, restoring the negative interior after Na⁺ influx depolarizes.