BIOL 2160 Chapter : Physio Chapter 14 Blood Vessels

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15 Mar 2019
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Pressure gradients drive flow from high pressure to low pressure. A gradient must exist throughout circulatory system to maintain blood flow. Pressure in aorta = mean arterial pressure (map) = Pressure in vena cava = central venous pressure (cvp) = Pressures and pressure drops in the pulmonary and systemic circuits 14. 3. Radius of vessel: in arterioles (and small arteries) - can regulate radius. Viscosity of fluid = : blood viscosity dependent on amount of, regulate blood flow by regulating, regulation of radius of arterioles (and small arteries, vasoconstriction. Relating pressure gradients and resistance in the systemic circulation. P = mean arterial pressure = map. R = total peripheral resistance = tpr. Example of the baroreceptor reflex in action: hemorrhage. Baroreceptor reflex quickly compensates for changes in blood pressure. Long-term regulation occurs through renal regulation of blood volume. Expand when the pressure of the blood rises. Aneurysms: weakness in arterial wall: ballooning, can be caused by, aortic & cerebral , symptoms:

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