BIOC33H3 Lecture Notes - Baroreceptor, Carotid Sinus, Common Carotid Artery
Document Summary
Blood flow (slide 32 lec 7: change in p/ resistance to blood flow, flow = p/r. Map drives blood flow in systemic circulation. R = tpr: major factors affecting: Vessel radius: 2 things to keep in mind when talking about blood flow/bp regulation. Blood flow within the systemic and pulmonary circuits is in parallel: blood does not go from one organ to the next. Resistance within a parallel circuit: total resistance of a network of parallel vessels is less than the resistance of the vessel having the lowest resistance. Parallel arrangement of vessels greatly reduces resistance to blood flow. With many parallel vessels, changing the resistance of a small number of these vessels will have little effect on total resistance for the segment. Ad, nad from sympathetic nervous system or adrenal glands: can have local factors exerting effects - low oxygen, high co2 causes vasodilation, myogenic smooth muscle response to stretch, it contracts. Local changes in metabolism (o2: 1.
