Psychology / Unit 3 Psych 0340 short lesson, about 20 seconds
Psychoactive Drugs
Captions available
The idea
A psychoactive drug is a substance that alters perception, mood, or consciousness by acting on neurotransmitter systems.
In practice
Caffeine blocks receptors for a transmitter that promotes sleepiness, producing alertness by removing a brake.
Where people slip
Legal status does not track pharmacological effect. Both categories contain substances with severe risk.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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