The location of the heart's pacemaker is a specialized region of cardiac muscle called the
A) atrioventricular node.
B) sinoatrial node.
C) right atrium.
D) left ventricle.

Question

Quizplus · Accepted Answer

The location of the heart's pacemaker is the sinoatrial (SA) node, which is a specialized region of cardiac muscle located in the right atrium near the opening of the superior vena cava. The SA node generates electrical impulses that control the heartbeat and set the pace for the rest of the heart. The atrioventricular (AV) node is another specialized region of cardiac muscle located at the junction between the atria and the ventricles, but it acts as a relay station for electrical signals rather than the main pacemaker. The right atrium and left ventricle are parts of the heart but not specifically related to the location of the pacemaker.

The Location of the Heart's Pacemaker Is a Specialized Region