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Short Term Control of Local Blood Flow:
Most tissues control their own blood flow depending on the requirement. In vasodilator theory, we saw that lack of oxygen causes production of vasodilator substances(), which cause vasodilatation(), and increase blood flow to bring more oxygen. In oxygen demand theory (or nutrient demand theory) we saw how precapillary sphincters and metarterioles undergo cycles of constriction and relaxation, with increased open state when demand is increased. When metabolic control mechanisms open small vessels, nitric oxide secondarily dilates upstream vessels. This thing! And finally, autoregulation prevents changes in blood flow in those organs where its not needed. So this was all about short term regulation of local blood flow.

Chapters:
00:00 Intro
00:45 Factors Controlling Local Blood Flow
01:23 Short vs Long-Term Control
02:02 Short-Term Control Mechanisms
02:27 Vasodilator Theory
04:05 Oxygen Demand Theory
07:04 Endothelium Derived Constricting & Relaxing Factors
08:01 Vasodilatation by Nitric Oxide
11:20 Endothelin
11:50 Autoregulation: Importance
14:31 Myogenic Response
15:28 Metabolic Regulation
16:00 Blood Pressure vs Blood Flow
17:59 Summary
18:59 Bonus

Dr Vipul Navadiya
Nonstop Neuron
Medical Animation
Medical Animation Videos
Physiology

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