ATI RN
Questions About the Nervous System Questions
Question 1 of 5
Clusters of cell bodies in the peripheral nervous system are known as:
Correct Answer: B
Rationale: Ganglia are clusters of cell bodies in the PNS (e.g., dorsal root ganglia). Nuclei are CNS clusters, tracts are axon bundles, and D is incomplete.
Question 2 of 5
During the resting state of a neuron, the membrane is primarily permeable to:
Correct Answer: B
Rationale: At rest (~-70 mV), the membrane is most permeable to potassium (K+) via leak channels, maintaining negative charge inside.
Question 3 of 5
Saltatory conduction occurs in myelinated axons and involves:
Correct Answer: B
Rationale: Saltatory conduction is rapid jumping between nodes, enhancing speed. Continuous is unmyelinated, slow isn’t typical, bidirectional rare.
Question 4 of 5
The layer of connective tissue that surrounds the entire nerve is known as the:
Correct Answer: B
Rationale: The epidural space is outside the meninges, not a nerve layer, but context suggests 'epineurium' (nerve sheath) was intended. (Q75 incomplete, corrected.)
Question 5 of 5
The composition of cerebrospinal fluid includes:
Correct Answer: A
Rationale: CSF has high glucose (energy) and low protein (unlike blood), reflecting its filtration from plasma.