Chapter_21[1 answer - Chapter 21- The Cardiovascular...

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Chapter 21- The Cardiovascular System: Blood Vessels and Hemodynamics Choose the single best answer to each question. 1) Which of the following is correct? A) Arteries carry blood away from the heart. B) Elastic arteries have larger diameters than muscular arteries. C) Muscular arteries branch into arterioles. D) A and B are correct. E) A, B and C are correct. 2) The sites of exchange between the blood and the tissues are the A) arteries B) arterioles C) capillaries D) venules E) veins 3) The blood supply of the larger blood vessels is called the A) capillary bed. B) vasa vasorum. C) peritubular capillary system. D) anastamosis. E) vasa recta 4) The blood vessels that drain blood directly from the capillary beds are the A) elastic arteries B) muscular arteries C) veins D) venules E) vena cavae 5) Which part of the arterial wall contains smooth muscle? A) tunica intima B) tunica media C) tunica externa D) A and B are correct. E) A, B and C are correct. 6) Which of the following does NOT cause vasodilation? A) increased sympathetic stimulation
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B) decreased sympathetic innervation C) increased H + concentration D) increased lactic acid concentration E) increased NO concentration 7) All of the following are elastic arteries EXCEPT the: A) aorta B) brachiocephalic artery C) common iliac artery D) radial artery E) subclavian artery 8) Muscular arteries A) are also called conducting arteries. B) contain more smooth muscle than elastic fibers in the tunica media. C) include the tibial and popliteal arteries. D) A and B are correct. E) A, B and C are correct. 9) Which blood vessels play a key role in regulating blood distribution and pressure because their diameters may be easily and rapidly adjusted? A) elastic arteries B) conducting arteries C) arterioles D) capillaries E) venules 10) Capillaries A) form more extensive beds in tissues that have greater metabolic rates. B) have a thick tunica media. C) receive blood from venules. D) drain into arterioles. E) are found in the cornea and in cartilage. 11) Sinusoids A) are straighter and narrower than other capillaries. B) are less porous than other capillaries. C) are found in the liver and red bone marrow. D) have no specialized lining cells.
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E) All of the above are correct. 12) Venules A) drain capillary beds. B) merge to form veins. C) provide exit points for phagocytic cells. D) A and B are correct. E) A, B and C are correct. 13) Veins A) carry blood toward the heart. B) have thick layers of smooth muscle in the tunica media. C) have no valves. D) have thin layers of connective tissue in the tunica externa. E) carry blood under high pressure. 14) Anastomoses A) are unions of the branches of two or more veins supplying the same body region. B) are unions of the branches of two or more arteries, veins, or arterioles and vessels supplying
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This note was uploaded on 12/07/2010 for the course BIO 2 taught by Professor Holtz during the Summer '09 term at Abraham Baldwin Agricultural College.

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Chapter_21[1 answer - Chapter 21- The Cardiovascular...

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