How much do you know about the Atrioventricular node (AV node)?
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Questions and Answers

What is the function of the atrioventricular node (AV node)?

  • To increase the speed of the cardiac impulse transmission
  • To allow for the atria to empty their blood into the ventricles before ventricular contraction begins (correct)
  • To allow for the ventricles to empty their blood into the atria before atrial contraction begins
  • To prevent the cardiac impulse from traveling too slowly from the atria into ventricles

    • What is the time delay of transmission of the cardiac impulse in the AV node?

  • 0.02 sec
  • 0.12 sec (correct)
  • 0.24 sec
  • 0.36 sec

    • Why does the cardiac impulse not travel from the atria into ventricles too rapidly?

  • To increase the speed of the cardiac impulse transmission
  • To prevent the ventricles from emptying their blood into the atria before atrial contraction begins
  • To allow for the atria to empty their blood into the ventricles before ventricular contraction begins (correct)
  • To allow for the ventricles to fill with blood before atrial contraction begins

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