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

Question

Quizplus · Accepted Answer

The pacemaker in the tetrapod heart is the Sinoatrial (SA) node, which is located in the right atrium. This specialized group of cells initiates the electrical impulses that coordinate the contraction of the atria and the subsequent contraction of the ventricles. None of the other choices listed are correct locations for the pacemaker in the tetrapod heart.

In the Tetrapod Heart,the Pacemaker Is in the