Multiple choice

Cardiac output is defined as the amount of blood

  1. received by the heart in one minute

  2. pumped by each ventricle per minute

  3. pumped by both ventricles per second

  4. pumped by the left atrium per hour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cardiac output is the volume of blood pumped by one ventricle (usually the left ventricle) per minute, calculated as stroke volume × heart rate. It represents the heart's pumping effectiveness. Option A is wrong because blood passes through, it's not 'received' by the heart. Cardiac output is measured per minute, not per second or hour.

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