Cardiac action potential

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4 Terms

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What are autorhythmic cells?

  • initiate action potentials

  • have unstable resting potentials called pacemaker potentials

  • use calcium influx (rather than sodium) for rinsing phase of the action potential

2
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How is the heart stimulated?

by the sympathetic cardioacceleratory centre

inhibited by the parasympathetic cardioinhibitory centre.

3
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How is the heart inhibited?

by the parasympathetic cardioinhibitory centre

4
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