Most gray matter of the cerebrum is located in which region?

• A. Corpus callosum
• B. Cerebral cortex
• C. Cerebral medulla
• D. Internal capsule

Answer: (B)

Verified step by step guidance

1. Understand the structure of the cerebrum: The cerebrum is the largest part of the brain and is divided into two hemispheres. It contains both gray matter and white matter, which serve different functions.
2. Define gray matter: Gray matter consists primarily of neuronal cell bodies, dendrites, and unmyelinated axons. It is responsible for processing information, including sensory input, motor commands, and higher cognitive functions.
3. Identify the cerebral cortex: The cerebral cortex is the outermost layer of the cerebrum and is composed of gray matter. It is involved in functions such as perception, thought, memory, and voluntary motor activity.
4. Differentiate the other options: The corpus callosum is a bundle of white matter that connects the two hemispheres of the cerebrum. The cerebral medulla and internal capsule are also composed of white matter, which primarily facilitates communication between different brain regions.
5. Conclude that the cerebral cortex is the correct answer: Since gray matter is concentrated in the outer layer of the cerebrum, the cerebral cortex is the region where most gray matter is located.