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Psychology  /  Psych 0340  ·  Atom · ~20 seconds

Psychoactive Drugs

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A psychoactive drug is a substance that alters perception, mood, or consciousness by acting on neurotransmitter systems.

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Caffeine blocks receptors for a transmitter that promotes sleepiness, producing alertness by removing a brake.

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Legal status does not track pharmacological effect. Both categories contain substances with severe risk.