ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
In the central nervous system, clusters of cell bodies are called:
Correct Answer: A
Rationale: Nuclei are clusters of cell bodies in the CNS (e.g., basal nuclei). Ganglia are PNS, tracts are axons, and nerves are PNS bundles.
Question 2 of 5
The initial stimulus for an action potential causes a brief influx of:
Correct Answer: A
Rationale: A stimulus opens sodium (Na+) channels, causing Na+ influx to depolarize the membrane and trigger an action potential.
Question 3 of 5
In a chemical synapse, neurotransmitters are stored in:
Correct Answer: C
Rationale: Synaptic vesicles in the axon terminal store neurotransmitters for release. Myelin insulates, hillock initiates, nodes conduct.
Question 4 of 5
The layer of the meninges that is most vulnerable to infection and inflammation is the:
Correct Answer: C
Rationale: The arachnoid mater is vulnerable to inflammation (e.g., meningitis). Pia is deep, dura tough, subarachnoid is a space.
Question 5 of 5
The primary function of arachnoid villi is to:
Correct Answer: C
Rationale: Arachnoid villi reabsorb CSF into venous sinuses. Choroid plexuses produce, ions are regulated broadly, support is CSF’s role.