When ventricular pressure exceeds atrial pressure, the
A) ejection occurs.
B) atria pump blood into the ventricles.
C) ventricle is in diastole.
D) blood is pumped into the atrium.
E) AV valves close.

Question

Quizplus · Accepted Answer

When ventricular pressure exceeds atrial pressure, the atrioventricular (AV) valves (mitral and tricuspid valves) close to prevent the backflow of blood into the atria. This event marks the beginning of ventricular systole.

When Ventricular Pressure Exceeds Atrial Pressure, the