An artificial pacemaker supplements the actions of
A)sympathetic neurons.
B)the atrioventricular node.
C)the medulla oblongata.
D)the sinoatrial node.
E)the heart muscle itself.

Question

Quizplus · Accepted Answer

The sinoatrial (SA) node is the natural pacemaker of the heart, responsible for initiating the electrical impulses that stimulate the contraction of the heart muscle. An artificial pacemaker supplements the SA node's actions by delivering an electrical impulse to the heart muscle when the SA node's function is compromised or inadequate.

An Artificial Pacemaker Supplements the Actions of