The heart's internal pacemaker beats by: OpenStax College Biology

Question 8 / 12: The heart's internal pacemaker beats by:

a. an internal implant that sends an electrical impulse through the heart

b. the excitation of cardiac muscle cells at the sinoatrial node followed by the atrioventricular
node

c. the excitation of cardiac muscle cells at the atrioventricular node followed by the sinoatrial
node

d. the action of the sinus

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