Predict the position of the valves when the ventricles contract.
A) Both AV valves and semilunar valves are forced shut.
B) Both AV valves are forced open while both semilunar valves are forced shut.
C) Both AV valves and semilunar valves are forced open.
D) Both AV valves are forced shut while both semilunar valves are forced open.

Question

Quizplus · Accepted Answer

When the ventricles contract, the AV valves close to prevent backflow into the atria, and the semilunar valves open to allow blood to flow into the arteries.

Predict the Position of the Valves When the Ventricles Contract