During phase 2 of the cardiac cycle, which of the following events are occurring? group of answer choices atria relax (diastole) while the ventricles contract (systole); av valves are closed while the semilunar valves are open and blood moves from the right ventricle into the pulmonary trunk, while blood moves from the left ventricle into the aorta. blood moves from the right ventricle into the pulmonary trunk, while blood moves from the left ventricle into the aorta. atria relax (diastole) while the ventricles contract (systole); av valves are closed while the semilunar valves are open. atria contract (systole) while the ventricles relax (diastole); av valves are open while the semilunar valves are closed. atria and ventricles are relaxed (diastole); av valves are open while the semilunar valves are closed.