Atropine's mode of action is to
A)speed up the rate of sinus node firing and speed conduction through the AV node.
B)speed impulse conduction through the bundle branches and AV node.
C)slow the rate of conduction through the AV node and slow sinus node firing.
D)speed sinus node firing and slow AV node conduction.

Question

Quizplus · Accepted Answer

Atropine works by blocking the action of acetylcholine at muscarinic receptors, which results in an increase in the rate of sinus node firing (thus increasing heart rate) and speeds up conduction through the AV node. This is why it is used in the treatment of bradycardia (slow heart rate).

Atropine's Mode of Action Is to