Impulses that initiate heart contraction are spontaneously generated in the

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Quizplus · Accepted Answer

The sinoatrial (SA) node, located in the right atrium of the heart, is responsible for the spontaneous generation of impulses that initiate heart contraction. These impulses then travel through specialized conducting fibers to the atrioventricular node, atrioventricular bundle, right and left bundle branches, and ultimately to the ventricular muscle cells, causing them to contract. Therefore, the correct choice is D) sinoatrial node.

Impulses That Initiate Heart Contraction Are Spontaneously Generated in the