The ________ is the pacemaker of the heart.
A)atrioventricular node
B)sinoatrial node
C)atrioventricular bundle
D)autonomic nervous system

Question

Quizplus · Accepted Answer

The sinoatrial node (SA node) is the pacemaker of the heart, as it is responsible for initiating the electrical impulses that cause the heart to beat. The atrioventricular node (AV node) and atrioventricular bundle, while important in the conduction of electrical impulses through the heart, are not the pacemaker. The autonomic nervous system plays a role in regulating the pace and strength of the heartbeat, but it is not the pacemaker itself.

The ________ Is the Pacemaker of the Heart