The primary pacemaker cell of the heart is the:
A) SA node.
B) bundle of His.
C) AV node.
D) Purkinje network.

Question

Quizplus · Accepted Answer

The SA node, or sinoatrial node, is the primary pacemaker of the heart. It is responsible for initiating the electrical impulses that regulate the heartbeat. While the other options (bundle of His, AV node, Purkinje network) also play important roles in the conduction of electrical impulses through the heart, the SA node is the primary initiator of these impulses.

The Primary Pacemaker Cell of the Heart Is The