The autonomic nervous system initiates the impulses that lead to contraction of the four chambers of the heart.

Name: The autonomic nervous system initiates the impulses that lead to contraction of the four chambers of the heart.
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The autonomic nervous system modulates the rate and force of heart contractions but does not initiate the impulses for contraction. The sinoatrial node, a group of specialized cells in the right atrium, is responsible for initiating the heart's impulses.

The Autonomic Nervous System Initiates the Impulses That Lead to Contraction