Question

The shortest phase of cardiac cycle is _________

• A. joint cardiac diastole
• B. ventricular systole
• C. atrial diastole
• D. atrial systole

Hint:

{Shortest phase = atrial systole (0.1 s)}.

Answer 1

The Correct Option is D

Step 1: Understanding phases of cardiac cycle.
The cardiac cycle consists of atrial systole, ventricular systole, and joint cardiac diastole, each having a specific duration.

Step 2: Duration comparison.
Atrial systole lasts for about 0.1 second, ventricular systole lasts about 0.3 second, and joint cardiac diastole lasts about 0.4 second.

Step 3: Conclusion.
Since atrial systole has the shortest duration, the correct answer is atrial systole.