What is autorhythmicity?

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Multiple Choice

What is autorhythmicity?

Autorhythmicity is the heart’s ability to generate its own rhythmic electrical impulses and contract without external neural stimulation. Specialized pacemaker cells, especially in the sinoatrial node, depolarize spontaneously due to their unique ion currents (the pacemaker potential), producing action potentials that set the heart’s pace and spread through the conduction system to coordinate beats. This intrinsic rhythm means cardiac muscle can contract on its own, even in the absence of nervous input. The autonomic nervous system and circulating hormones then modulate the rate and strength of those contractions, rather than being required to initiate them.

Autorhythmicity is the heart’s ability to generate its own rhythmic electrical impulses and contract without external neural stimulation. Specialized pacemaker cells, especially in the sinoatrial node, depolarize spontaneously due to their unique ion currents (the pacemaker potential), producing action potentials that set the heart’s pace and spread through the conduction system to coordinate beats. This intrinsic rhythm means cardiac muscle can contract on its own, even in the absence of nervous input. The autonomic nervous system and circulating hormones then modulate the rate and strength of those contractions, rather than being required to initiate them.

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