Cardiac Physiology Lecture Quiz
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Questions and Answers

Which structure in the heart is known as the pacemaker?

  • Atrioventricular bundle (bundle of His)
  • Purkinje fibers
  • Sinoatrial node (SAN) (correct)
  • Atrioventricular node (AVN)

    • What is the function of the atrioventricular node (AVN) in the conduction system of the heart?

  • Allow time for the atria to contract and complete the filling of the ventricles (correct)
  • Rapidly distribute excitation wave throughout the ventricular walls
  • Initiate the heartbeat
  • Extend branches of fibers to all parts of the ventricular walls

    • Where are the Purkinje fibers located in the heart?

  • Ventricular walls (correct)
  • Left bundle branches
  • Right atrium
  • Interventricular septum

    • What is the role of tight junctions between cardiac muscle cells?

    <p>Allow the whole atria and ventricles to work as one syncytium</p> Signup and view all the answers

    In which part of the heart is the conductivity highest due to rapid conduction of excitation wave?

    <p>Atrioventricular bundle (bundle of His)</p> Signup and view all the answers

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