The atrioventricular valves are closed when ________.
A) atrial pressure is greater than ventricular pressure
B) the atria contract
C) the ventricles fill with blood
D) atrial pressure is less than ventricular pressure
E) atrial systole occurs

Question

Quizplus · Accepted Answer

The atrioventricular valves, including the mitral valve and tricuspid valve, are closed during ventricular systole when the pressure in the ventricles is greater than in the atria. Option A is incorrect because the AV valves actually open when atrial pressure is greater than ventricular pressure, allowing blood to pass from the atria into the ventricles. Option B and E are also incorrect because they do not describe the specific conditions under which the AV valves are closed. Option C is inaccurate because the AV valves are normally closed when the ventricles are filling with blood, not when they are already full.

The Atrioventricular Valves Are Closed When ________