[Answer] Which of the following is the primary pacemaker of the heart?

Answer: SA Node

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Which of the following is the primary pacemaker of the heart? primary pacemaker cells of the heart - MedHelp Cardio-Chapter 22 (Exam-Review Questions) Flashcards | Quizlet Pacemaker | American Heart Association Tue Dec 04 2018 · A pacemaker regulates your body’s electrical system which controls your heart rhythm. With each heartbeat an electrical impulse travels from the top of your heart … One percent of the cardiomyocytes in the myocardium possess the ability to generate electrical impulses (or action potentials) spontaneously. A specialized portion of the heart called the sinoatrial node (SA node) is responsible for atrial propagation of this potential. The sinoatrial node (SA node) is a group of cells positioned on the wall of the right atrium near the entrance of the superior vena cava. These cells are modified cardiomyocytes. They possess rudimentar… The sinoatrial (SA) node or sinus node is the heart's natural pacemaker. It's a small mass of specialized cells in the top of the right atrium (upper chamber of the heart). It produces the electrical impulses that cause your heart to beat. A chamber of the heart contracts when an electrical impulse or signal moves across it. The primary pacemaker of the mammalian heart is the sino-atrialnode . If the SA node fails the atrioventricular node (AV node)takes over pac...

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