A patient is looking at a picture of the brain and points to the convolutions on the surface of the cerebrum. The nurse should tell the patient these are called:
a. sulci.
b. fissures.
c. reticular formations.
d. gyri.
ANS: D
The surface of the cerebrum (cerebral cortex) is covered with convolutions called gyri, which greatly increase the cortical surface area and the number of neurons. Neither sulci, fissures, nor reticular formations cover the cerebrum in a fashion that increases its surface.
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