Test B

Depressants

Drugs that generally slow central nervous system activity.

Example: Alcohol can slow reaction time.

Glutamate

The brain's main excitatory neurotransmitter, important for learning and memory.

Example: Glutamate helps neurons communicate during learning.

Autonomic Nervous System

Controls automatic body functions like heartbeat and digestion. Example: Your heart automatically beats faster when scared.

Corpus Callosum

A bundle of nerve fibers connecting the brain's left and right hemispheres.

Example: It allows the two hemispheres to communicate.

Substance P

A chemical messenger involved in transmitting pain signals.

Example: It helps communicate pain after an injury.