Which of the following events occur during early ventricular systole? A. the atria are relaxed, the ventricles are filling passively, the atrioventricular valves are open B. the ventricles are starting to contract, the atrioventricular valves are closed, the semilunar valves are closed C. the atria contract, the ventricles are relaxed, the atrioventricular valves are open D. the atria are relaxed, the ventricles are starting to relax, the atrioventricular valves are opening, the semilunar valves are closing.
Option B. Early ventricular systole occur when the ventricles are starting to contract, the atrioventricular valves are closed, the semilunar valves are closed.
