A signal is generated by the SA node and is regularly discharged to the rest of the conduction system.Which of the following best describes this activity?

Question

Quizplus · Accepted Answer

The description matches the phenomenon of automaticity and rhythmicity, which refers to the ability of the SA node to initiate regular electrical impulses that depolarize the cardiac muscle and cause contractions. Option A refers to the mechanical process of muscle movement, option C refers specifically to the location of the SA and AV nodes within the heart's electrical conduction system, and option D refers to the sounds associated with the closing of heart valves during the cardiac cycle.

A Signal Is Generated by the SA Node and Is