Question

chapter 12 multiple choice question 4
1 part | -- of 1 point

the brain stem consists of the ______.

○ pons, medulla, cerebellum, and midbrain
○ cerebrum, pons, midbrain, and medulla
○ midbrain, medulla, and pons
○ midbrain only

Explanation:

To solve this, we recall the anatomical structure of the brain stem. The brain stem is composed of the midbrain, pons, and medulla oblongata. The cerebellum is part of the hindbrain but not the brain stem, and the cerebrum is a separate major brain region. So we analyze each option:

• First option: Cerebellum is not part of the brain stem, so incorrect.
• Second option: Cerebrum is not part of the brain stem, so incorrect.
• Third option: Midbrain, medulla, and pons are the components of the brain stem, correct.
• Fourth option: Brain stem has more than just midbrain, so incorrect.

Answer:

C. midbrain, medulla, and pons (Note: Assuming the options are labeled A, B, C, D with A as first, B as second, C as third, D as fourth. So the correct option is C. midbrain, medulla, and pons)