Lab Report - Blood Flow and Vascular Function Article

Lab Report - Blood F woeful and Vascular usance - Article ExampleIt is the sympathetic nervous system which sends out signals to arteries instructing the smooth muscle, arterial wall to strike and relax.Veins are the other type of major blood vessel and are responsible for carrying blood towards and into the heart, in order to become oxygenated. Veins ope valuate under lower pressure than arteries and do not possess the akin elasticity that arteries do. Veins transport unoxygenated blood as opposed to arteries which carry oxygenated blood. Veins, like arteries, have lumens, that they are comparably wider than the lumens of arteries. Veins are composed of venules, which are tiny blood vessels that pull blood from capillaries into the developed vein. Veins are actually composed of three tissue layers but are less elastic than the walls of arteries.The decree of blood flow during exercise is governed by the demands of the muscle tissue being used. Certainly, when an individual is exercising, the heart rate increasing as a response to the forms immediate need for larger amounts of oxygenated blood. The bodys blood flow rate can increase during exercise by as overmuch as 20 times more than what it is at rest. During periods of exercise, all of the bodys capillaries are loose and in use versus the mere of the bodys capillaries which are used at rest.During periods of exercise, the body experiences what is called low oxygen tension. This is a result of the use of multiple muscular groups during periods of heavy performance. In addition, vasodilators are released as the demand for oxygenated blood throughout the body increases, Low oxygen tensions resulting from greatly increased muscular activity or the release of vasodilator substances such as lactic acid, carbon dioxide, and potassium ions causes dilation of precapillary sphincters. change magnitude sympathetic stimulation and epinephrine released from the adrenal medulla cause some vasoconstriction in t he