Cardiac output is a function of heart rate and stroke volume. In children, why is heart rate higher at rest and during exercise?
A) Because in children, stroke volume is directly related to how much left ventricular stiffness reduces diastolic filling.
B) Because in children, cardiac output is regulated more by peripheral resistance than V02 max by any other variable.
C) Because children typically have a lower stroke volume compared to adults.
D) Because children typically have a more elevated peripheral resistance compared to adults.
Correct Answer:
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