Examlex
In current U.S.commercial nuclear reactors,
Stimulant
A substance that raises levels of physiological or nervous activity in the body.
Mental Activity
Processes of the mind that include thinking, perceiving, remembering, reasoning, and any other form of cerebral operation.
Physical Activity
Any movement of the body that requires energy expenditure, contributing to improving or maintaining physical fitness.
Depressant
Depressant describes substances that reduce arousal and stimulation in the body, often prescribed to relieve anxiety, tension, and sleep disorders.
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