Which of the following statements are true of the stroke volume?
I.It is about 110 to 120 mL.
II.Contraction ejects about 70 mL.
III.The end-systolic volume is about 50 mL.
IV.A low ejection fraction is considered one that is less than 50%.

Question

Quizplus · Accepted Answer

The end-diastolic volume of each ventricle is about 110 to 120 mL. Contraction ejects about 70 mL of blood (the stroke volume), leaving behind about 40 to 50 mL (the end-systolic volume). The filled ventricles normally eject about 60% of their volume (the ejection fraction). A low ejection fraction (less than 50%) indicates poor contractility and pumping failure.

Which of the Following Statements Are True of the Stroke