MCAT Question of the Day 91 – Biology Which one of the following is true during systole?The bicuspid valve is open.Blood does not flow through the aortic valve.Both semilunar valves are closed.Pressure in the atria is low, and thus the atria fill with blood from the vena cava and pulmonary veins.Vote to see resultsVote By admin| 2015-09-28T13:16:08+00:00 October 25th, 2015|Comments Off on MCAT Question of the Day 91 – Biology Share This Story, Choose Your Platform! FacebookTwitterGoogle+Email