Structure and Function of the Brain

The ________ is the structure in the brain that plays an important role in emotions, especially fear.

The _________ is the oldest and deepest part of the brain.

• amygdala

• brain stem

• hippocampus

• thalamus

Representing about 11 percent of the brain’s weight, it is a deeply folded and highly organized structure containing more neurons than the rest of the brain.

• cerebrum

• frontal lobe

• cerebellum

• hippocampus

A soft, jellylike mass, the ________ is the largest area, representing nearly 80 percent of the brain by weight.

This part of the brain is not fully developed in adolescence. This is why they are more likely to engage in high-risk behavior.

• hippocampus

• hypothalamus

• thalamus

• frontal lobe

Greek for "sea horse" because of its shape, the ___________ plays a major role in memory and learning.

By controlling the release of a variety of hormones, it moderates numerous body functions, including sleep, body temperature, food intake, and liquid intake.

• hypothalamus

• thalamus

• brain stem

• amygdala

Greek for "inner chamber," all sensory information except smell comes here first.