ATI RN
Questions About the Nervous System Questions
Question 1 of 5
The ___ is the innermost meningeal layer, clings tightly to the surface of the brain and spinal cord, following every fold.
Correct Answer: B
Rationale: The pia mater is the innermost meningeal layer, adhering closely to the brain and spinal cord. The arachnoid mater is the middle layer, dura mater the outermost, and tentorium cerebelli is a dura extension.
Question 2 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 3 of 5
Which class of drugs may be used to treat bronchial asthma?
Correct Answer: C
Rationale: Adrenergic drugs (e.g., β₂ agonists like albuterol) dilate bronchi to treat asthma. Cholinergics constrict, anticholinesterases enhance acetylcholine, blockers inhibit dilation.
Question 4 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 5 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.