HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Received by heart per minute
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Pumped by ventricles per second
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Pumped by left ventricle per minute
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Pumped by left ventricle per hour
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Detailed explanation-1: -Cardiac output is the product of heart rate (HR) and stroke volume (SV) and is measured in liters per minute. HR is most commonly defined as the number of times the heart beats in one minute. SV is the volume of blood ejected during ventricular contraction or for each stroke of the heart.
Detailed explanation-2: -This means that in one minute, each ventricle of a normal heart pumps about 5 litres of blood.
Detailed explanation-3: -Cardiac output is the result of systolic contraction of the left ventricle, which can be influenced by preload, afterload, and contractility. Cardiac output (CO) is defined as the amount of blood that is pumped out of the heart in a given time.
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: -Cardiac output, expressed in liters/minute, is the amount of blood the heart pumps in 1 minute. Cardiac output is logically equal to the product of the stroke volume and the number of beats per minute (heart rate).