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Ch. 19 Online quiz

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nessaram994's version from 2017-10-22 17:55

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Question Answer
The action of aldosterone is to ________. a.result in a larger output of urine b. promote an increase in blood pressure c. decrease sodium reabsorption (retention) d.. promote a decrease in blood volume b. promote an increase in blood pressure
True or False: Hypotension is generally considered as having diastolic blood pressure that is below 90 mm Hg.False
Which statement best describes arteries? a. All carry oxygenated blood to the heart. b. All contain valves to prevent the backflow of blood. c. Only large arteries are lined with endothelium. d. All carry blood away from the heart. d. All carry blood away from the heart.
Which of the following is the most significant source of blood flow resistance? (hint: it's the one that can be changed the quickest) a. blood vessels type b. total blood vessel length c. blood vessel diameter d. blood viscosity c. blood vessel diameter
Which of the choices below is the closest to the lumen of a blood vessel? a. endothelium b. tunica media c. collagen fibers d. smooth muscle a. endothelium
True or False: Vasodilation is a widening of the lumen due to smooth muscle contraction.False
The velocity of blood flow is ________. a. slowest in the capillaries because the total cross-sectional area is the greatest b. slower in the veins than in the capillaries because veins have a large diameter c. increases when the total cross-sectional area of the blood vessels increases d. slower in the arteries than in capillaries because arteries possess a relatively large diametera. slowest in the capillaries because the total cross-sectional area is the greatest
Select the correct statement about factors that influence blood pressure. a. Excess red cell production would cause a blood pressure increase. b. Systemic vasodilation would increase blood pressure, due to diversion of blood to essential areas. c. Excess protein production would decrease blood pressure. d. An increase in cardiac output corresponds to a decrease in blood pressure, due to the increased delivery.a. Excess red cell production would cause a blood pressure increase.
Which of the following types of vessels allows the exchange of nutrients and gases between the blood and tissue cells? a. capillaries b. arteries c. arterioles d. veins a. capillaries
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