BIO 169 Exam 1 Questions and Answers Already Passed

BIO 169 Exam 1 Questions and Answers Already Passed What is an essential aspect of factors that resist blood flow? All of the Above What term describes a network that permits an organ to be supplied by several arteries or to drain through multiple veins? Vascular anastomoses How should arteries be accurately described in terms of their role? They are the vessels that deliver blood away from the heart What effect does a drop in hematocrit have on the viscosity of blood and consequently on blood pressure? A lower hematocrit decreases blood viscosity, which in turn reduces blood pressure What defines systolic pressure? All of the above 2 How do blood vessels in a lung area respond when oxygen levels are low due to damage or disease? They constrict to limit blood flow to that region What does the term vasodilation signify? It denotes the enlargement of a blood vessel’s diameter What feature is characteristic of continuous capillaries? They form part of the barrier protecting the brain How is blood flow velocity related to the cross-sectional area of blood vessels? Blood flows slower in vessels with a larger cross-sectional area, such as capillaries Which type of blood vessel has only a single layer of tissue called the tunica interna? Capillaries What are the potential outcomes if the kidneys secrete renin? 3 All of the above, leading to increased blood pressure What impact does alcohol have on bodily functions? It reduces ADH release, which leads to blood vessel dilation and causes a flushed appearance Which of the following does not lead to increased resistance in blood vessels? Increasing the diameter of the blood vessel Which hormone secreted by the heart functions to lower blood pressure? Atrial natriuretic peptide What is true regarding the regulation of blood flow into capillaries? Precapillary sphincters, made of smooth muscle, manage blood flow into capillary networks Which circuit in the cardiovascular