Smoking cigarettes can impact a person's mood and behavior because an active ingredient in cigarettes acts as a(n) ______ at a receptor for acetylcholine.

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The active ingredient in cigarettes, nicotine, acts as an agonist at receptors for acetylcholine, meaning it binds to these receptors and activates them, mimicking the action of acetylcholine. This can lead to changes in mood and behavior.

Smoking Cigarettes Can Impact a Person's Mood and Behavior Because