3. Describe the control of cardiovascular function during exercise including local control, the metaboreflex, central control and...

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Medical Sciences

3. Describe the control of cardiovascular functionduring exercise including local control, the metaboreflex, centralcontrol and baroreceptor resetting.
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Physical activities with large muscle mass such as running cycling and rowing can produce a reduction in systemic vascular resistance SVR because of the intense metabolic vasodilatation in the muscle vasculature via functional sympatholysis This fact constitutes a challenge for the cardiovascular apparatus and it would cause a drop in blood pressure if control mechanisms did not contemporarily augment cardiac output CO Thus the active muscle competes with blood pressure regulation for blood flow Despite the vasodilationinduced SVR decrease dynamic exercise in normal subjects is characterized only by a small to moderate increase in mean arterial pressure MAP Convincing evidence demonstrates that this fine hemodynamic tuning is determined by the See Answer

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