BIOC34H3 : study guide
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Resistance: degree to which blood flow is hindered. 4 factors affecting vascular resistance: vessel radius: primary regulator of resistance. the more haematocrit you have, the greater viscosity: if temperature is increased, viscosity decreases (for ever degree, 2% decrease in viscosity, laminar vs. turbulent flow, laminar flow: blood moving smoothly in one direction moving forward. We have this when healthy: turbulent flow: erratic flowing of blood. It is not healthy, but happens when you have plaque build up or hardening of arteries: poiseuille"s law: r = 8l / r 4, l = vessel length; n = viscosity; r = radius; r = resistance. Total peripheral resistance: the combined resistance of all blood vessels in systematic circulation. Blood flow within systematic and pulmonary circuits is in parallel, not from one organ to the next: parallel circuits decrease blood flow resistance. www. notesolution. com, ensures each organ receives oxygenated blood, ensures independent regulation of blood flow.
