Asked by Nicole Weber on Jul 01, 2024
Verified
What causes the AV (atrioventricular) valves within the heart to open during the cardiac cycle?
A) pressure generated by ventricular muscle contraction
B) an action potential
C) fluid pressure from the atria filling with blood
D) a pacemaker signal
E) arterial blood pressure
Atrioventricular Valves
Valves located between the atria and ventricles of the heart that prevent the backflow of blood.
Cardiac Cycle
Sequence of contraction and relaxation of heart chambers that occurs with each heartbeat.
- Gain knowledge of the cardiac cycle and heart valve operation.
Verified Answer
AC
Angelica CarrilloJul 01, 2024
Final Answer :
C
Explanation :
The AV valves open due to fluid pressure from the atria filling with blood. As the atria contract and fill with blood, the pressure in the atria increases and pushes open the AV valves, allowing blood to flow into the ventricles.
Learning Objectives
- Gain knowledge of the cardiac cycle and heart valve operation.
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