Difficulty: Medium
Average Score: 76%
Entry Exam
Passage / Scenario
What primarily makes up the 'gray matter' of the brain?
Correct answer
B
Rationale
The 'gray matter' of the brain primarily consists of neuron cell bodies. Gray matter is responsible for processing information in the brain as it contains the cell bodies of neurons, dendrites, and unmyelinated axons. Meninges are the protective membranes covering the brain and spinal cord, the corpus callosum is a structure connecting the two brain hemispheres, and neuron cell axons are part of the white matter in the brain.