Question

the gray matter on the outer surface of the cerebrum is called the:
a cortex
b reticular formation
c arbor vitae
d cerebral medulla
e pia mater

Explanation:

• Cortex: The cerebral cortex is the outer layer of the cerebrum composed of gray matter. It is responsible for higher - order brain functions such as perception, memory, thought, and voluntary movement.
• Reticular formation: It is a network of nerve fibers and cells in the brainstem, not the outer surface of the cerebrum. It is involved in functions like consciousness, sleep - wake cycles, and motor control.
• Arbor vitae: This is the white matter in the cerebellum, which has a tree - like appearance. It is not related to the outer surface of the cerebrum.
• Cerebral medulla: Refers to the white matter deep within the cerebrum, not the outer gray matter layer.
• Pia mater: One of the meninges (membranes covering the brain), it is a thin inner layer, not the gray matter on the outer surface of the cerebrum.

Answer:

A. cortex