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Topic 7: Cardiac action potential. Define and describe the differences in the location and function of cardiac...

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Medical Sciences

Topic 7: Cardiac action potential.

Define and describe the differences in the location andfunction of cardiac autorhythmic and contractile cells. in detaildraw and describe the action potential of these two cell types ofmaking sure to include

  • Voltages At which important events occur

    • Resting membrane potential

    • Threshold potential

    • Peak of the action potential

    • Repolarization and hyperpolarization phase

  • types of different ion channels and their statethroughout

    • When do they open and close?

  • What ions are moving where and when

  • any other relevant information

Answer & Explanation Solved by verified expert
3.7 Ratings (468 Votes)
Rhythmicity or autorhythmicity orselfexcitation is the ability of a tissue to produce itsown impulses regularly heart has a specialized excitatorystructure called pacemaker From here the impulses spread to otherparts through the specialized conductive systemcardiac autorhythmic cells are composed of SA node AV node andAV bundlesthe auto rhythmic cells which serves as a pacemakerhelps in initiating the cardiac cycle ie pumpingthe blood from the heart to other body organsautorhythmic cells can generate their own actionpotentialcontractile cells are those cells which areresponsible for contractions that pump blood through the bodymost of the muscle cells in the heart are    See Answer
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