ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
What is the function of the myelin sheath in nerve fibers?
Correct Answer: C
Rationale: Myelin facilitates conduction by enabling saltatory conduction, not preventing it. Resistance decreases, and neurotransmitter release is synaptic.
Question 2 of 5
What is the role of calcium ions in the process of neurotransmitter release?
Correct Answer: B
Rationale: Ca2+ influx triggers vesicle exocytosis, releasing neurotransmitters. It doesn’t inhibit or bind postsynaptically.
Question 3 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 4 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 5 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.