ATI RN
Questions About the Nervous System Questions
Question 1 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 2 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 3 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 4 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.
Question 5 of 5
The primary motor cortex, responsible for the voluntary control of skeletal muscles, is located in the:
Correct Answer: A
Rationale: The primary motor cortex (precentral gyrus) in the frontal lobe controls skeletal muscles.