ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which of the following is NOT an aging effect on the nervous system?
Correct Answer: D
Rationale: Aging decreases neurotransmitters, increases disorders, and reduces neurons. Mental activities don’t inherently increase with age.
Question 2 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 3 of 5
In the peripheral nervous system, Schwann cells wrap around the:
Correct Answer: C
Rationale: Schwann cells wrap around axons in the PNS to form myelin. Axon hillock and cell body are unmyelinated, dendrites rarely myelinated. (Answer corrected from 'nodes' to 'axon' based on context.)
Question 4 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 5 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.