Question

18 multiple choice 10 points during ventricular contraction, what is the status of the atrioventricular valves? the tricuspid valve is open and the mitral valve is closed. the mitral and tricuspid valves both are closed. the mitral and tricuspid valves both are open. the mitral valve is opened and the tricuspid valve is closed.

Explanation:

During ventricular contraction, the pressure in the ventricles rises. To prevent back - flow of blood into the atria, the atrioventricular valves (mitral and tricuspid) close.

Answer:

The mitral and tricuspid valves both are closed.