Question

The adult brain weighs around three pounds. Its size and weight are proportional to body size, not intelligence. Which of the following statements best describes the anatomy of the brain?

a. The brain has no influence on intelligence.
b. The three major parts of the brain each weigh about one pound.
c. The IQ of an individual increases with the increasing size of the brain.
d. The IQ of an individual decreases with the increasing weight of the brain.
e. The IQ of an individual cannot be predicted from the size of the brain.
f. The IQ of an individual cannot be predicted from the size of the brain.

Answer 1

The brain can be divided into three parts: the forebrain, midbrain, and hindbrain. The size and weight of the brain are proportional to body size, not intelligence. The IQ of an individual cannot be predicted from the size of the brain.

Step-by-step explanation:

Anatomically, the brain can be divided into three parts: the forebrain, midbrain, and hindbrain. The forebrain includes the several lobes of the cerebral cortex that control higher functions, while the midbrain and hindbrain are more involved with unconscious, autonomic functions. The size and weight of the brain are generally proportional to body size, not intelligence. The IQ of an individual cannot be predicted from the size of the brain.