HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Heart rate
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Stroke volume
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Blood flow
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Both a and b
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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: -Cardiac output is calculated by multiplying stroke volume with heart rate.
Detailed explanation-3: -There are three variables affecting stroke volume, which include contractility, preload, and afterload. [8] The definition of contractility is the force of myocyte contraction, referred to as the heart’s inotropy.
Detailed explanation-4: -As we all know, Cardiac output is the total volume of blood that heart pumps every minute. The formula used to calculate cardiac output is given as CO = HR × SV. SV-Stroke volume-the amount of blood circulated by the heart with each beat.