ANIMAL PHYSIOLOGY
HUMAN CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4500 mL/min
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1.25 mL/min
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0.8 mL/min
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120 mL/min
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Detailed explanation-1: -So, the correct answer is ‘6750 ml ‘.
Detailed explanation-2: -The average Heart Rate for a person is 75 beats/min and Stroke Volume is 70 ml/beat; with this we get Cardiac Output as 5, 250 ml/Min or we can say 5 L/Min.
Detailed explanation-3: -Thus, the correct answer is ‘70 mL.
Detailed explanation-4: -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 70 beats per minute, and 70 ml blood is ejected with each beat of the heart, the cardiac output is 4900 ml/ minute.
Detailed explanation-5: -Stroke volume is the amount of blood the left ventricle pumps out in one cardiac cycle. This is around 70 ml. Now to get cardiac output we have to multiply stroke volume with the normal heart rate of 72 beats/min and we get 5, 040 ml/min. This means that in one minute, a normal heart pumps about 5 litres of blood.