ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
Supporting cells located within the CNS are collectively called:
Correct Answer: A
Rationale: Neuroglia (glial cells) support CNS neurons (e.g., astrocytes, oligodendrocytes). Astrocytes are a subtype, perikaryon is the cell body, satellite cells are PNS.
Question 2 of 5
Parasympathetic fibers arise from which set of cranial nerves?
Correct Answer: C
Rationale: Parasympathetic fibers originate from cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), plus sacral S2-S4. Option C matches this.
Question 3 of 5
One reason for the division of the ANS is that:
Correct Answer: D
Rationale: The ANS divides into sympathetic and parasympathetic due to their typically opposing effects (e.g., heart rate up vs. down). Both use two neurons; abdominal organs have dual innervation.
Question 4 of 5
The receptors for acetylcholine at the ganglia of both the sympathetic and parasympathetic divisions are:
Correct Answer: C
Rationale: Nicotinic receptors at ANS ganglia (both divisions) bind acetylcholine from preganglionic neurons. Muscarinic are postganglionic, atropine blocks muscarinic, isoproteranol is adrenergic.
Question 5 of 5
A ganglion is an aggregate of nerve cell bodies:
Correct Answer: B
Rationale: Ganglia are clusters of nerve cell bodies outside the CNS (e.g., sympathetic chain). Inside CNS, they’re called nuclei.