205textnotes35 - E Distribution of Blood in the...

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E. Distribution of Blood in the Tissues ---------------------------------------------------------------------------------------------------------- Constriction of blood vessels can control blood flow into various regions of the body ( ) as well sphincters can open or close capillary beds ( Fig. 15-15 ). ---------------------------------------------------------------------------------------------------------- Chapter 15: BLOOD FLOW AND THE CONTROL OF BLOOD PRESSURE ---------------------------------------------------------------------------------------------------------- C. Blood Pressure ---------------------------------------------------------------------------------------------------------- Fig. 15-8 - Mean arterial pressure is a function of cardiac output and resistance in the arterioles: Mean Arterial Pressure: MAP = CO x R(arterioles); R(arterioles) = total peripheral resistance = TPR therefore MAP = CO x TPR; This is similar to Ohm's law V = I x R, expanding MAP = Hr x SV x TPR
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