The action potential in cardiac contractile cells is a critical process that drives the heart’s rhythmic contractions, distinctly different from skeletal muscle due to its unique phases. This chart illustrates the long plateau phase and extended refractory period caused by calcium ion influx, while comparing it to skeletal muscle action potential, offering a clear view of cardiac electrophysiology. Exploring this image provides valuable insights into how these cells sustain the heart’s pumping action.
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