Final answer:
Depressant drugs suppress the central nervous system, leading to decreased reaction time, judgement, and inhibitions. They work by lowering neurotransmission levels in the brain.
Step-by-step explanation:
Depressants are drugs that decrease reaction time, judgement, and inhibitions by suppressing the central nervous system. They lower neurotransmission levels in various areas of the brain, which reduces arousal or stimulation. Examples of depressants include alcohol, barbiturates, and benzodiazepines.
These drugs work by serving as agonists of the gamma-Aminobutyric acid (GABA) neurotransmitter system, which has a quieting effect on the brain. By inhibiting brain activity, depressants can lead to slower reaction times, impaired judgement, and decreased inhibitions.