Question

during the cardiac cycle, at the time of highest ventricular pressure, what is the status of the heart valves? multiple choice atrioventricular valves are open; semilunar valves are closed. atrioventricular valves are closed; semilunar valves are closed. atrioventricular valves are closed; semilunar valves are open. atrioventricular valves are open; semilunar valves are open.

Explanation:

During ventricular systole when ventricular pressure is highest, the atrioventricular valves (AV valves) close to prevent back - flow of blood into the atria, and the semilunar valves open to allow blood to be ejected into the arteries.

Answer:

C. Atrioventricular valves are closed; semilunar valves are open.