Cardiac Muscle and Electrophysiology
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Questions and Answers

What is the composition of the myocardium?

  • Skeletal muscles and myocytes
  • Lactate and anaerobic conditions
  • Myocytes and oxygenated blood (correct)
  • Coronary arteries and myocytes

    • What happens to the myocytes without oxygen?

  • They fade and eventually die (correct)
  • They become permeable to sodium
  • They produce lactate
  • They enter a polarized state

    • Which type of muscle can produce lactate under anaerobic conditions?

  • Skeletal muscles (correct)
  • Smooth muscles
  • Striated muscles
  • Cardiac muscles

    • What is the resting membrane potential of cardiac cells?

    <p>-70mV</p> Signup and view all the answers

    During depolarization, what happens to the inside of the resting cell?

    <p>It decreases in negativity</p> Signup and view all the answers

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