What is the mechanism of action of atropine?

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Multiple Choice

What is the mechanism of action of atropine?

Explanation:
Atropine is an antimuscarinic drug. It blocks muscarinic acetylcholine receptors, which are the receptors the parasympathetic (vagal) pathways use to slow the heart and stimulate secretions. By occupying these receptors, atropine prevents acetylcholine from binding, so parasympathetic effects are blunted. In the heart, this removes the vagal restraint, leading to a faster heart rate. It also reduces secretions and dilates pupils, among other effects. So the mechanism is best described as inhibiting the action of the vagus nerve.

Atropine is an antimuscarinic drug. It blocks muscarinic acetylcholine receptors, which are the receptors the parasympathetic (vagal) pathways use to slow the heart and stimulate secretions. By occupying these receptors, atropine prevents acetylcholine from binding, so parasympathetic effects are blunted. In the heart, this removes the vagal restraint, leading to a faster heart rate. It also reduces secretions and dilates pupils, among other effects. So the mechanism is best described as inhibiting the action of the vagus nerve.

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