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Unformatted text preview: Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The muscular layer of a blood vessel is the A) tunica externa. B) tunica intima. C) tunica adventitia. D) tunica media. E) tunica interna. 1) 2) Compared to arteries, veins A) are more elastic. B) have thinner walls. C) have a pleated endothelium. D) have more smooth muscle in their tunica media. E) hold their shape better when cut. 2) 3) Arrange the structures in the following list in the order that blood will encounter as it flows from the output side to the input side of the cardiovascular flow circuit. 1. venules 2. arterioles 3. capillaries 4. elastic arteries 5. medium veins 6. large veins 7. muscular arteries A) 7, 4, 2, 3, 1, 5, 6 B) 5, 6, 1, 3, 2, 7, 4 C) 4, 7, 2, 3, 1, 5, 6 D) 2, 7, 6, 3, 1, 5, 6 E) 6, 5, 1, 3, 2, 7, 4 3) 4) Capillaries that have a complete lining are called A) continuous capillaries. B) vasa vasorum. C) sinusoids. D) sinusoidal capillaries. E) fenestrated capillaries. 4) 5) Capillaries with a perforated lining are called A) fenestrated capillaries. B) discontinuous capillaries. C) vasa vasorum. D) sinuses. E) perforated capillaries. 5) 1 6) Exchange between a blood vessel and the cells that surround it can occur only in A) capillaries. B) arteries. C) veins. D) venules. E) arterioles. 6) 7) Materials can move across capillary walls by A) reabsorption. B) diffusion. C) filtration. D) all of the above E) A and B only 7) 8) Blood flow through a capillary is controlled by the A) precapillary sphincter. B) thoroughfare channel. C) plexus. D) vasa vasorum. E) venule. 8) 9) Blood moves forward through veins because of all of the following, except A) the pressure in the veins is lower than in the arteries. B) the respiratory pump. C) pumping by the smooth muscle in the wall of the vein. D) muscular compression. E) valves in the veins preventing the backward flow of blood. 9) 10) Metabolites exchange by diffusion with tissue cells in which of the following locations? A) capillary B) venule C) artery D) vein E) arteriole 10) 11) Total peripheral resistance is related to all of the following, except the A) blood vessel diameter. B) blood viscosity. C) length of a blood vessel. D) flow characteristics. E) osmolarity of interstitial fluids. 11) 12) As blood travels from arteries to veins, A) viscosity increases. B) pressure drops. C) flow becomes turbulent. D) diameter of the blood vessels gets progressively smaller. E) pressure builds. 12) 13) Blood flow to a tissue will increase if the A) level of oxygen at the tissue increases. B) arterioles dilate. C) level of carbon dioxide at the tissue decreases....
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