BIOSC 1250 Lecture Notes - Lecture 14: Mean Arterial Pressure, Vascular Resistance, Vascular Smooth Muscle

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23 Nov 2017
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Regulation of regional blood flow & overall cardiovascular regulation (lecture 14) Mean arterial pressure = cardiac output x total peripheral resistance ( p = f x r) Variety of things that impact mean arterial pressure. Mean arterial pressure = driving force of getting blood to tissues same for all tissues. Blood flow is not the same for all tissues. Even tissue per unit tissue (based on size) get different flow rates (i. e. bigger tissue does not necessarily receive more blood flow) Tissues with high energy needs (e. g. brain, heart) receive high blood flow. Tissues with important functions in regulating blood composition (kidneys, liver) receive high blood flow. Muscle, skin, & bone at rest have low energy needs & therefore low blood flow. Different resistances of different tissues determines the different relative blood flows. *if (cid:272)ardia(cid:272) output i(cid:374)(cid:272)reases & resista(cid:374)(cid:272)e does(cid:374)"t (cid:272)ha(cid:374)ge, (cid:271)lood flo(cid:449) (cid:449)ill i(cid:374)(cid:272)rease dire(cid:272)tl(cid:455) proportionally.

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