ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
Which phase of the action potential involves the efflux of potassium ions?
Correct Answer: D
Rationale: Repolarization involves K+ efflux, restoring the negative inside potential. Rising is Na+ influx, falling overlaps, overshoot is peak.
Question 2 of 5
The fourth ventricle is located between the pons and the cerebellum and is continuous with the central canal of the spinal cord and the:
Correct Answer: D
Rationale: The fourth ventricle connects to the spinal canal and exits CSF via the foramen magnum (subarachnoid space). Others are upstream.
Question 3 of 5
The majority of CSF is absorbed into the bloodstream through the:
Correct Answer: B
Rationale: Arachnoid villi absorb CSF into venous blood. Choroid plexuses produce, ependymal cells line, sinuses receive.
Question 4 of 5
The corticospinal tract is an example of a:
Correct Answer: A
Rationale: The corticospinal tract is a projection tract, sending motor signals from cortex to spinal cord.
Question 5 of 5
The primary somatosensory cortex, responsible for processing tactile information such as touch and pressure, is located in the:
Correct Answer: B
Rationale: The primary somatosensory cortex (postcentral gyrus) in the parietal lobe processes touch.