Which of the following structures does not require stimulation from nerve fibers or other agents?
A) Papillary muscles
B) Sinoatrial node
C) Atrial syncytium
D) AV bundle
E) Ventricular cardiac cells

Question

Quizplus · Accepted Answer

The sinoatrial (SA) node does not require stimulation from nerve fibers or other agents to initiate its activity. It is the heart's natural pacemaker, capable of generating electrical impulses on its own due to its unique pacemaker cells, thereby setting the rhythm for the rest of the heart.

Which of the Following Structures Does Not Require Stimulation from Nerve