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Cardiac Conductive System Quiz
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Cardiac Conductive System Quiz

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Questions and Answers

What is the resting membrane potential in myocardial working cells?

  • -60 mV to -65 mV
  • -70 mV to -75 mV
  • -95 mV to -100 mV
  • -85 mV to -90 mV (correct)

    • During isovolumetric relaxation, what is the state of the cardiac valves?

  • All valves are open
  • Atrioventricular valves are open, semilunar valves are closed
  • All valves are closed (correct)
  • Atrioventricular valves are closed, semilunar valves are open

    • Which nerve mediates the oculo-cardic reflex?

  • Trigeminal nerve (correct)
  • Vagus nerve
  • Glossopharyngeal nerve
  • Facial nerve

    • What causes calcium influx from extracellular fluid to sarcomeres during myocardial contraction?

    <p>Action potential</p> Signup and view all the answers

    Which phase of the action potential of the myocardial cells is important for impulse formation?

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