lec19-09 - KIN 205: Chapter 11, Peripheral nervous system:...

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Unformatted text preview: KIN 205: Chapter 11, Peripheral nervous system: Control of arteriolar diameter. (see Table 15-2) Type Mechanism Response Myogenic activity ↑ Stretch of wall due to ↑ pressure Vasoconstrict Paracrines from metabolism ↓ O2, ↑ CO2, ↑ H+, ↑ K+ Vasodilate Parcrine signal molecules Nitric oxide, histamine, adenosine Endothelins Vasodilate Vasoconstrict ↑ Sympathetic (NE on α receptor) Vasoconstrict Reflex control Nervous Nervous system reflex control: Sympathetic division is responsible. Tonic sympathetic discharge (Fig. 15-12a) and increases in sympathetic firing rate (Fig. 15-12b). ...
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