Blood pressure and flow questions 57) Blood flow through a capillary bed is regu
ID: 3521110 • Letter: B
Question
Blood pressure and flow questions 57) Blood flow through a capillary bed is regulated by precapillary sphincters. (True or False) 58) The velocity of blood flow decreases when A. viscosity increases. B. blood pressure increases C. vessel radius increases D. afterload increases. so) kypertension is commonly considered to be achronic resting blood presure higher han A. 18000. B. 130/60. C. 12075. D. 140/90. 60) Vasomotion is associated with the presence of A. collagen and elastic tissue in the tunica media. B. elastic tissue in the tunica externa. C. endothelium in the tunica interna. D, smooth muscle in the tunica media. 61) These are all possible circulatory routes from the heart except A. heart-arteries-capillary bed -veins-heart B. heart->arteries-capillary bed -vein-capillary bed -> veins-heart C. heart arteries capillary bed -vein->capillary bed->arteries-+heart D. heart-arteries ->arterial anastomosis -capillary bed veins+heart has the most important effect on blood velocity 62) A. Blood viscosity B. Vessel radius C. Blood osmolarity D. Hematocrit 63) The vasomotor center of thecontrols blood vessels throughout the body A. hypothalamus B. medulla oblongata C. spinal cord D. cerebellum 64) These are all mechanisms of movement through the capillary wall except A. reabsorption. B. filtration. C. secretion. D. transcytosis.Explanation / Answer
57. Blood flow is regulated by precapillary sphincher which only allow unidirectional flow of blpod into capillary bed. Statement is true.
58. Vasodilation causes decrease in blpod pressure. Option C is correct.
59. 140/90 is the blood pressure at which is a condition called hypertension. Mainly due to continuous drug use causes elevation in blood pressure. Option D is correct.
60. Smooth muscles in tunica media which lines the walls of vessels causes vasomotion. Option D is correct.