ANP 1105 Final Exam Questions & Answers 2024/2025

ANP 1105 Final Exam Questions & Answers 2024/2025 What are the 3 layers of blood vessels? - ANSWERSTunica intima, tunica media and tunica externa Innermost tunica intima - ANSWERSSimple squamous epithelium to allow a low friction surface Middle tunica media - ANSWERSSmooth muscle and elastic tissue to control the diameter Outermost tunica externa - ANSWERSNerve and elastic fibers Vasa vasorum - ANSWERSTiny blood vessels that supply blood for larger ones Vasoconstriction - ANSWERSSmooth muscle constricts to decrease the diameter Vasodilation - ANSWERSSmooth muscle relaxes to increase the diameter Elastic arteries - ANSWERSThick walled and near the heart. They have the largest lumens and are considered to be the conducting vessels (send blood from heart to medium arteries) Atherosclerosis - ANSWERSHardening of the arteries. Blood flow gushes/trickles as the heart beats, causing the vessel walls to weaken or eventually balloon out (aneurysm), or burst Muscular arteries - ANSWERSConsidered to be the distributing vessels (deliver blood to organs). Diameter ranges greatly Arterioles - ANSWERSThe resistance vessels: diameter determines blood flow to capillaries as a mechanism of homeostasis that responds to neural, hormonal, and chemical influences