Question

describe the normal function of each body system 0 of 5
which of the following describes the activities during ventricular
systole?
both atrioventricular valves close; the pulmonary and aortic semilunar valves open
both atrioventricular valves open; the pulmonary and aortic semilunar valves close
both atrioventricular valves and the pulmonary and aortic semilunar valves close
both atrioventricular valves and the pulmonary and aortic semilunar valves open
submit
nov 7 8:59

Explanation:

During ventricular systole, the ventricles contract. The atrioventricular valves (tricuspid and mitral) close to prevent back - flow of blood into the atria. At the same time, the pulmonary (from right ventricle to pulmonary artery) and aortic (from left ventricle to aorta) semilunar valves open to allow blood to be ejected from the ventricles.

Answer:

both atrioventricular valves close; the pulmonary and aortic semilunar valves open