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Double Circulation

The volume of...

Question

The volume of blood pumped out by the two ventricles of human heart per minute is

A

5 L

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B

10 L

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C

15 L

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D

20 L

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Solution

The correct option is A $5 L$
The correct answer is A.
Cardiac output is the volume of blood being pumped by the heart in a minute. It is equal to the heart rate multiplied by the stroke volume. So if there are 72 beats per minute, and 72 ml blood is ejected with each beat of the heart, the cardiac output is 5184 ml/ minute. Around 5L.

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Q. In humans, the volume of blood pumped out by each ventricle per minute is

Q. Calculate the cardiac output (ml)of an athlete if the volume of blood pumped by each ventricle per beat is 70 ml and the heart rate is 80 beats per minute.

Q. (i) During a cardiac cycle each ventricle pumps out approximately

70

mL of blood which is called the stroke volume.
(ii) The cardiac output of an athlete will be much higher than that of an ordinary man.
(iii) The body has no the ability to alter the stroke volume and the cardiac output.
(iv) The cardiac output can be defined as the volume of blood pumped out by each ventricle per minute.
(v) Volume of blood pumped by left ventricle is higher than blood pumped by right ventricle.
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