Lab 4 - Human Cardiovascular

New york raven press 1979 increase in tpr increase in

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Unformatted text preview: ase MAP (MAP = TPR X CO) Hyperemia Active vs. Reactive Hyperemia Two types of hyperemia allow for local yp regulation of blood flow. Reactive Hyperemia – is not due to a change in Hyperemia is not due to change in metabolism, metabolism, but rather to inadequate perfusion. Blood Flow is Occluded = Build-up of Flow is Occluded Build up of Metabolites Metabolites Once occlusion is removed – get increased ge blood blood flow Active Hyperemia – reaction to an increase in tissue metabolism (e.g. exercise) Vasodilation and increase in tissue blood flow Active Hyperemia Hyperemia Reactive Hyperemia Cardiorespiratory Response to Exercise Response is proportional to the workload Limited by individual’s workload capacity Central Command establishes initial response Central Command – establishes initial response to to dynamic exercise Ergoreceptors in muscle tendons in tendons Local control of blood flow to active muscles Interaction of central respiratory control and cardiovascular cardiovascular control Large increase in arterial systolic blood pressure bl Little change in diastolic pressure The Dive Reflex Allows for prolonged submersion by limiting the rate of oxygen use and directing blood flow to essential organs di bl fl The result of this reflex is bradycardia and intense bradycardia intense vasoconstriction in all systemic organs except the vasoconstriction in all systemic organs except the brain brain and the heart This respo...
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This document was uploaded on 01/13/2014.

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