BIOL 2P97 Chapter Notes - Chapter 15: Medulla Oblongata, Adrenergic Receptor, Cytosol

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Biol 2p97: blood flow and the control of blood pressure. Pressure produced by contraction of the left ventricle is stored in the elastic walls of arteries and slowly released through elastic recoil which maintains a continuous driving pressure for blood flow during ventricular relaxation. Arteries are known as the pressure reservoir of the circulatory system. Arterioles create a high-resistance outlet for arterial blood flow and direct distribution of blood flow to individual tissues by selectively constricting and dilating, so they are known as the site of variable resistance. When blood flows into capillaries, their leaky epithelium allows exchange of materials between the plasma, interstitial fluid, and cells of the body. At the distal end of capillaries, blood flows into the venous side of circulation. Veins act as a volume reservoir from which blood can be sent to the arterial side of the circulation if bp falls too low.

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