ATI RN
Questions About the Nervous System Questions
Question 1 of 5
The myelin sheath produced by Schwann cells functions to:
Correct Answer: D
Rationale: Myelin increases conduction speed via saltatory conduction. Transmission is axonal, protection partial, and neurotransmitter regulation is synaptic.
Question 2 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 3 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 4 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.
Question 5 of 5
The cerebrum is divided into two hemispheres, connected by a bundle of nerve fibers known as the:
Correct Answer: A
Rationale: The corpus callosum connects cerebral hemispheres. Medulla, thalamus, and pons have other roles.