In the Tetrapod Heart,the Pacemaker is The

Question

In the tetrapod heart,the pacemaker is the
A)atrioventricular bundle.
B)purkinje fibers.
C)vagus nerves.
D)cardiac control center.
E)Sinoatrial (SA)node.

Accepted Answer

In the tetrapod heart, the pacemaker is the Sinoatrial (SA) node, a specialized tissue located in the right atrium that generates the electrical impulses that stimulate the contraction of the heart. The other options listed are also involved in the regulation and control of the heartbeat, but they do not have the primary role of serving as the pacemaker.