What Region of the Heart Acts as the Heart's Pacemaker

Question

What region of the heart acts as the heart's pacemaker?
A) sinoatrial (SA) node
B) atrioventricular (AV) node
C) semilunar valve
D) ventricle

Accepted Answer

The SA node is located in the right atrium of the heart and is responsible for initiating the electrical impulses that regulate the heartbeat. It acts as the heart's pacemaker.