ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The four major lobes of the cerebral cortex are the frontal, parietal, temporal, and:
Correct Answer: A
Rationale: The occipital lobe is a cerebral lobe (vision). Cerebellar is cerebellum, limbic is a system, insular is deep.
Question 5 of 5
The premotor cortex is involved in the planning and coordination of voluntary movements and is located anterior to the:
Correct Answer: A
Rationale: The premotor cortex, anterior to the primary motor cortex, plans movements.