Multiple choice

Cardiac cycle in man takes about ______.

  1. 0.5 second

  2. 0.8 second

  3. 1.0 second

  4. 1.2 seconds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The human cardiac cycle consists of one complete heartbeat (systole + diastole) and takes approximately 0.8 seconds at a normal resting heart rate of about 75 beats per minute (60/75 = 0.8 sec). 0.5s would mean 120 bpm (too fast), while 1.0-1.2s would mean only 50-60 bpm (unusually slow for a healthy adult at rest).

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