Question

when blood is flowing out of the left ventricle, the bicuspid valve is ________ and the aortic semilunar valve is ________. multiple choice closed; closed open; open closed, open

Explanation:

When blood is flowing out of the left ventricle, the bicuspid (mitral) valve between the left atrium and left ventricle closes to prevent back - flow of blood into the left atrium. The aortic semilunar valve opens to allow blood to flow from the left ventricle into the aorta.

Answer:

C. closed, open