Multiple choice

The amount of blood ejected by each heart beat is called

  1. cardiac output

  2. stroke volume

  3. threshold output

  4. ejection fraction

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stroke volume is the correct term for the amount of blood ejected by the left ventricle during each heartbeat. In a healthy adult at rest, this is approximately 70-80 mL. Cardiac output is the total blood pumped per minute (stroke volume × heart rate). Ejection fraction is the percentage of blood pumped out relative to the total blood in the ventricle. 'Threshold output' is not a standard cardiac term.

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