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Cardiac Cycle and Heart Tissue Electrical Changes Quiz
5 Questions
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Cardiac Cycle and Heart Tissue Electrical Changes Quiz

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Questions and Answers

What initiates the electrical activity in the heart?

  • SA node (correct)
  • AV node
  • Bundle of His
  • Purkinje system

    • What influences the sinus rate of the SA node?

  • Both cholinergic and sympathetic innervations (correct)
  • Parasympathetic innervation
  • Adrenaline release
  • Sympathetic innervation

    • Where does the electrical activity move after the SA node?

  • Ventricles
  • Bundle branches
  • AV node (correct)
  • Purkinje system

    • What causes the muscle contraction in the heart?

    <p>Electrical changes in heart tissue</p> Signup and view all the answers

    What creates the electrical gradient in the cardiac cell membrane?

    <p>Differences in ion concentrations</p> Signup and view all the answers

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