BIOL 235 CHAPTER 21 FULLY COVERED

BIOL 235 CHAPTER 21 FULLY COVERED arteries - CORRECT ANSWER-carry blood away from the heart, large and elastic arterioles - CORRECT ANSWER-stem from arteries FUNCTION: regulate flow of blood into the capillary networks capillaries - CORRECT ANSWER-as arterioles inter a tissue, they branch into capillaries most capillaries are continuous capillaries; plasma membrane of endothelial cells form continuous tube found in CNS, lungs, muscle tissue, skin FUNCTION: nutrient exchange between blood and interstitial fluid, blood to postcapillary venules venules - CORRECT ANSWER-groups of capillaries within a tissue reunite and form venules veins - CORRECT ANSWER-blood vessels that convey blood from the tissues back to the heart have valves that prevent back flow of blood FUNCTION: blood back to heart, facilitate by valves in limbs tunica interna - CORRECT ANSWER-endothelium layer forming innermost blood vessel and contacts the blood as it flows through the lumen basement membrane deep to the epithelium provides physical support internal elastic lamina is the outermost layer of the tunica interna and facilitates diffusion of materials tunica media - CORRECT ANSWER-middle muscular and connective tissue layer, functions to regulate diameter of lumen through smooth muscle and elastic fibers external elastic lamina separates the tunica media from the interna externa vasoconstriction - CORRECT ANSWER-narrowing of blood vessels caused by sympathetic stimulation