Which of The Following Best Describes the Mechanism of Action of Atropine in the Treatment of Bradycardia?
A. It directly stimulates muscarinic receptors, increasing parasympathetic tone and heart rate.
B. It competitively inhibits muscarinic acetylcholine receptors, decreasing parasympathetic influence on the sinoatrial node, thereby increasing heart rate.
C. It acts as a beta-1 adrenergic agonist, increasing cardiac output through enhanced sympathetic stimulation.
D. It inhibits the breakdown of acetylcholine at nicotinic receptors, leading to increased heart rate and blood pressure.
Option B
Option B
Option B
Option B
Option B
Option B