Following Are Events That Occur During the Cardiac Cycle

Multiple Choice

Following are events that occur during the cardiac cycle.
1) Ventricular pressure increases and exceeds pressure in the arteries.
2) Ventricles fill passively.
3) Atrial relaxation begins.
4) Atrial contraction forces a small amount of additional blood into relaxed ventricles.
5) Pressure in ventricles drops and blood flows back against cusps of semilunar valves, forcing them closed.
6) Ventricular contraction pushes AV valves closed.
Choose the correct order of events in the cardiac cycle.

A) 4, 6, 3, 1, 2, 5
B) 2, 6, 1, 4, 3, 5
C) 3, 6, 1, 5, 4, 2
D) 2, 5, 1, 6, 3, 4
E) 4, 3, 6, 1, 5, 2