The rapidly depolarizing cells, called pacemaker cells, are found in the ________, which is embedded in the posterior wall of the right atrium.
A) right bundle branch
B) AV node
C) left bundle branch
D) intermodal pathways
E) SA node

Question

Quizplus · Accepted Answer

The statement describes the SA (sinoatrial) node, which is located in the posterior wall of the right atrium and is responsible for initiating the electrical impulses that regulate the heartbeat. Choice A describes a part of the heart's electrical conduction system that helps to distribute impulses to the ventricles. Choice B describes a junctional area between the atria and ventricles that helps to delay impulses and coordinate their arrival in the ventricles. Choice C describes another part of the heart's electrical conduction system that helps to distribute impulses to the ventricles. Choice D describes the pathways that connect the SA node to the AV node.

The Rapidly Depolarizing Cells, Called Pacemaker Cells, Are Found in the ________