Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate of about 100 beats per minute?

Question

Quizplus · Accepted Answer

The sinoatrial (SA) node, located in the right atrium of the heart, acts as the natural pacemaker by generating action potentials that cause contraction of the heart muscle. The SA node typically causes a steady rate of about 100 beats per minute, which can be modified by various factors such as exercise, stress, and hormones.

Which Structure in the Heart Initiates Action Potentials That Stimulate