The location of the heart's pacemaker is a specialized region of cardiac muscle called the
A)atrioventricular node.
B)sinoatrial node.
C)Purkinje fibers.
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. The SA node is responsible for generating electrical impulses that set the rhythm of the heartbeat. The atrioventricular node (A) is another specialized region of cardiac muscle, located in the interatrial septum. The Purkinje fibers (C) are long, branching fibers that extend from the left and right bundle branches and spread throughout the ventricles, transmitting electrical impulses to the myocardium. The left ventricle (D) is one of the four chambers of the heart and is responsible for pumping oxygen-rich blood to the body's organs and tissues.

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