Question

the cells of the ____ act as the hearts pacemaker, which establishes the pace for cardiac activity. multiple choice sinuatrial (sa) node atrioventricular (av) bundle atrioventricular (av) node

Explanation:

The sinoatrial (SA) node is a group of specialized cells in the right atrium of the heart that spontaneously generate electrical impulses, setting the rhythm of the heartbeat and acting as the heart's natural pacemaker. The atrioventricular (AV) bundle and AV node are involved in the conduction of electrical signals but do not initiate the heartbeat like the SA - node.

Answer:

A. sinuatrial (SA) node