During ventricular contraction,what statement is true?
A) The atrioventricular valves are open.
B) The atrioventricular valves are closed.
C) The aortic valve is closed.
D) The pulmonary valve is closed.

Question

Quizplus · Accepted Answer

During ventricular contraction, also known as systole, the atrioventricular valves (mitral and tricuspid) are closed to prevent backflow of blood into the atria. The aortic valve is open to allow blood to be pumped out into the aorta, while the pulmonary valve is also closed to prevent backflow into the right ventricle.

During Ventricular Contraction,what Statement Is True