PHYS 1302 Lecture 5: ch-15-blood-flow-and-the-control-of-blood-pressure-synopsis
Document Summary
Blood flow and control of blood pressure (ch. Blood leaving left heart enters systemic arteries. Pressure produced by ventricular contraction is stored in the elastic walls of arteries and slowly released via elastic recoil. Maintains continuous driving pressure for blood flow during ventricular relaxation. Arteries are known as the pressure reservoir of the circulatory system. Arterioles create high-resistance outlet for arterial blood flow. Direct distribution of blood flow to individual tissues via selectively constricting and dilating. Site of variable resistance have leaky epithelium which allow material exchange. Arteries take blood away from heart (not all though) Elastic walls and thick layers of vascular smooth muscles. Veins take blood back to heart (not all though) Vascular smooth muscle: smooth muscle of blood vessels. Depends on entry of ca2+ into extracellular fluid via ca2+ channels. Arteries and arterioles carry blood away from the heart. As arteries divide into smaller and smaller arteries, character of the wall changes.
