Question

chapter 12 end of chapter review question 2
1 part of 1 point
2 tries left
which of the following is true of the cerebral hemispheres of the human brain?
nearly the entire surface of the cerebral hemispheres is marked by shallow grooves called gyri.
the cerebral hemispheres account for about 83% of total brain mass.
the longitudinal fissure separates the cerebral hemispheres from the cerebellum.
nearly the entire surface of the cerebral hemispheres is marked by elevated ridges called sulci.

Explanation:

To solve this, we analyze each option:

• Option 1: Gyri are elevated ridges, sulci are shallow grooves. So this is incorrect.
• Option 2: The cerebral hemispheres do account for about 83% of total brain mass. This is correct.
• Option 3: The longitudinal fissure separates the two cerebral hemispheres, not from the cerebellum. Incorrect.
• Option 4: Sulci are shallow grooves, gyri are elevated ridges. So this is incorrect.

Answer:

B. The cerebral hemispheres account for about 83% of total brain mass.