Exam 2: BIOS 255 / BIOS255 (2024/ 2025 Update) Anatomy and Physiology III Review with Questions and Verified Answers| 100% Correct| Grade A -Chamberlain

Exam 2: BIOS 25 5 / BIOS25 5 (2024/ 2025 Update) Anatomy and Physiology I II Review with Questions and Verified Answers| 100% Correct| Grade A -Chamberlain Q: why is the tunica media thicker in arteries than veins? Answer: they supply more pressure to blood Q: what are the only blood vessels that contain valves? Answer: veins and venules Q: what do valves do? Answer: prevent back flow of blood Q: what is an artery Answer: blood vessels that transports blood AWAY from the heart and TOWARDS the capillaries Q: are arteries oxygen rich or oxygen poor? Answer: oxygen rich Q: what is a vein? Answer: vessels that drain blood from the capillaries and transport it TOWARDS the heart Q: are veins oxygen rich or oxygen poor? Answer: oxygen poor Q: what is a capillary? Answer: microscopic vessel that allows for the exchange of substances between blood and tissues Q: what are capillaries composed of? Answer: layer of endothelium and a basement membrane Q: what are elastic arteries composed of? Answer: more elastic fibers than smooth muscle Q: what do elastic arteries do? Answer: conduct blood from the heart to distant muscular arteries Q: why do elastic arteries stretch? Answer: to accommodate blood being ejected from the ventricle Q: what do muscular arteries consists of? Answer: multiple layers of smooth muscle Q: what do muscular arteries do? Answer: allow vessels to vasodilate and vasoconstrict to regulate distribution of blood Q: what do arterioles do Answer: deliver blood to the capillaries where nutrient and gas exchange occur Q: what do arterioles consists of Answer: attached to capillary beds, pre capillary sphincter Q: pre capillary sphincter function Answer: used to control blood flow through the systemic capillary Q: arterioles are always under what? and what is it regulated by? Answer: vasomotor tone, regulated by vasomotor center of the brainstem Q: what do continuous capillaries consists of Answer: endothelial cells that encircle lumen, filtration cleft, systemic capillaries Q: what is the function of continuous capillaries? Answer: move small nutrients and waste through simple diffusion diffusion and bulk flow endocytosis Q: where are continuous capillaries found? Answer: muscles and skin