The sinoatrial (SA) node is located in which chamber of the heart and is responsible for:

The sinoatrial (SA) node is located in which

Multiple choice — select the best answer

ALeft ventricle; generating the maximum force needed to pump blood through the aorta
BLeft atrium; regulating blood pressure via baroreceptor feedback
CRight ventricle; controlling the rate of blood flow into the pulmonary circuit
DRight atrium; initiating the electrical impulse that sets the heart rate

✓ Correct answer: D. Right atrium; initiating the electrical impulse that sets the heart rate The SA node, embedded in the wall of the right atrium, is the heart's natural pacemaker — it spontaneously depolarizes and generates the action potential that initiates each heartbeat.

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The sinoatrial (SA) node is located in which chamber of the heart and is responsible for:

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