HHP 3500 Lecture Notes - Lecture 26: Vascular Smooth Muscle, Pulse Pressure, Vascular Resistance

• School: University of Iowa
• Department: Health and Human Physiology
• Course: HHP 3500
• Professor: Peterson Clayton

Document Summary

Hemodynamics is the relationship between flow, pressure, and resistance to bulk flow: bulk flow between two points =difference in pressure/resistance, flow = l/min, pressure = force exerted upon the blood by the vessel walls; mmhg. Based on hydrostatic pressure, and vascular tone, which can change: resistance- related directly to length of tube/path (l), the viscosity of the fluid (n, based on hematocrit, hematocrit ^, viscosity ^) As diameter of tube increases, resistance decreases. R = (8ln/pi r^4: to increase flow rate, we have to either increase pressure gradient or lowering the resistance. Pressure changes: pressure changes throughout vasculature, veins