PNB 2265 Lecture 11: Lecture 11
13 Feb 2017
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Local control: regulation at arteriole blood each tissue needs. Low ph, more acidic amounts of blood depending on the tissue. Regulate the radius of the arterioles depending on how much. Blood flow is adjusted to meet needs of the tissue: All tissues can get blood at the same time, but different. Decreased blood pressure in organ (flow autoregulation) Sympathetic ns is responsible for vasoconstriction (alpha receptors) and. Main regulator of map!!! (mean arteriole pressure) Use neurons to innervate because your tissue knows it needs to adjust and it just won"t. Can vasoconstrict and vasodilate, only using (cid:498)gas pedal(cid:499) Will constrict at an alpha adrenergic receptor. Neural (reflex) control: innervation by neurons can change radius. Everywhere there are tissues, there are capillary beds to manage exchange. Decrease map and bp to reduce amount of blood going through to heart. Increase in blood returned stretches out ions,water)
