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Questions and Answers
What is the function of the atrioventricular node (AV node)?
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?
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?
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
