Question

The following five events occur during the cardiac cycle in humans:
1. ventricular diastole
2. bicuspid and tricuspid valves forced open
3. blood forced back again bicuspid and tricuspid valves
4. blood forced back against semilunar valves
5. atrial systole

What is the correct sequence of these events?

Answer 1

\[A. 2\rightarrow5\rightarrow3\rightarrow4\rightarrow1\]
\[B. 3\rightarrow2\rightarrow4\rightarrow5\rightarrow1\]
\[C. 4\rightarrow1\rightarrow2\rightarrow3\rightarrow5\]
\[D. 5\rightarrow2\rightarrow3\rightarrow1\rightarrow4\]

Answer 2

maybe D
you know it is commonly said systole and diastole

Answer 3

The answer Is D for sure because the only possibility for the last option is "blood forced back against semilunar valves" refering to ventricular systole (the last phase of the cardiac cycle)