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1. The muscular layer in the wall of a blood vessel is the A) tunica intima. B) tunica externa. C) tunica media. D) tunica interna. E) tunica adventitia. C 2. Compared to arteries, veins A) are more elastic. B) have more smooth muscle in their tunica media. C) have a pleated endothelium. D) have thinner walls. E) hold their shape better when cut. D Upgrade to remove ads Only $0.99/month 3. Capillaries that have a complete lining are called A) continuous capillaries. B) fenestrated capillaries. C) sinusoidal capillaries. D) sinusoids. E) vasa vasorum. A 4. The smallest arterial branches are called the A) precapillary arterioles. B) arterioles. C) capillaries. D) venules. E) veins. A 5. The layer between the tunica media and the tunica externa in a large artery is the A) tunica intima. B) external elastic membrane. C) tunica media. D) internal elastic membrane.

E) tunica externa. B 6. The thoroughfare channel ends at the A) artery. B) arteriole. C) capillary. D) venule. E) vein. D 7. Which of the following layers of a vessel contains collagen fibers with scattered bands of elastic fibers? A) tunica intima B) external elastic membrane C) tunica media D) internal elastic membrane E) tunica externa E 8. After blood leaves the capillaries, it enters the A) arteries. B) arterioles. C) capillaries. D) venules. E) veins. D 9. Which layer of a blood vessel contains concentric sheets of smooth muscle tissue? A) tunica intima B) external elastic membrane C) tunica media D) internal elastic membrane E) tunica externa C 10. The large vessels that return blood to the heart are called A) arteries. B) arterioles. C) capillaries. D) venules.

E) veins. E 11. In large arteries, the thick layer of elastic fibers is called the A) tunica intima. B) external elastic membrane. C) tunica media. D) internal elastic membrane. E) tunica externa. D 12. Which of the following is the innermost layer of a blood vessel? A) tunica intima B) external elastic membrane C) tunica media D) internal elastic membrane E) tunica externa A Upgrade to remove ads Only $0.99/month 13. Venoconstriction ________ the amount of blood within the venous system, which ________ the volume in the arterial and capillary systems. A) doubles; decreases B) reduces; increases C) decreases; doubles D) increases; reduces E) reduces; reduces B 14. Venous valves are responsible for A) preventing anterograde flow. B) channeling blood away from the heart. C) channeling blood toward the heart. D) preventing blood from re-entering a ventricle. E) regulating blood pressure in veins. C 15. Venae cavae are the largest of what type of vessel? A) artery

B) arteriole C) capillary D) venule E) vein E 16. The layer of the arteriole wall that can produce vasoconstriction is the A) tunica adventitia. B) tunica media. C) tunica intima. D) tunica externa. E) tunica mater. B 17. Of the following arteries, the one that is an elastic artery is A) the subclavian artery. B) the external carotid artery. C) the brachial artery. D) the femoral artery. E) the ulnar artery. A 18. You would expect to find fenestrated capillaries in A) skeletal muscles. B) cardiac muscle. C) the pituitary. D) bone. E) skin. C 19. A sample of tissue displays many large flattened spaces lined by fenestrated endothelium. Blood moves slowly through these spaces. This tissue sample most likely came from the A) heart. B) lungs. C) liver. D) kidneys. E) skin. C 20. Factors that increase the risk of atherosclerosis include which of the following?

A) high cholesterol B) lack of exercise C) smoking D) obesity E) All of the answers are correct. E 21. These vessels may be continuous or fenestrated. A) arteries B) arterioles C) capillaries D) venules E) veins C 22. What structure do RBCs move through single file? A) artery B) arteriole C) capillary D) venule E) vein C Upgrade to remove ads Only $0.99/month 23. Capillaries with a perforated lining are called A) perforated capillaries. B) discontinuous capillaries. C) fenestrated capillaries. D) sinuses. E) vasa vasorum. C 24. Exchange between a blood vessel and the cells that surround it can occur only in A) arteries. B) arterioles. C) veins. D) venules. E) capillaries. E

25. Which kind of vessel is also called a resistance vessel? A) artery B) arteriole C) capillary D) venule E) vein B 26. Blood flow through a capillary is controlled by the A) vasa vasorum. B) plexus. C) precapillary sphincter. D) thoroughfare channel. E) venule. C 27. The common iliac artery is an example of which type of artery? A) arteriolar B) elastic C) connective D) muscular E) vascular B 28. Which of the following lumen diameters would be typical of a muscular artery? A) 0.2 mm B) 1.0 cm C) 0.4 mm D) 0.4 cm E) 1.5 cm D 29. Venoconstriction reduces the diameter of which vessel? A) artery B) arteriole C) capillary D) venule E) vein E 30.

The brachial and femoral arteries are examples of which type of artery? A) arteriolar B) elastic C) connective D) muscular E) vascular D 31. Which vessel is known as a resistance vessel? A) arteriole B) elastic C) connective D) muscular E) venule A 32. What vessels contain elastic fibers in the walls that are stretched during systole? A) arteries B) arterioles C) capillaries D) venules E) veins A

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33. Which of the following is most likely to result from an aneurysm in a brain artery? A) hypotension B) quadriplegia C) stroke D) myocardial infarction E) pulmonary embolism C 34.

Complications related to arteriosclerosis account for roughly ________ percent of deaths in the United States. A) 30 B) 60 C) 20 D) 50 E) 25 D 35. What vessels hold the largest percentage of the blood supply? A) artery B) arteriole C) capillary D) venule E) vein E 36. Arteriosclerosis can lead to A) hypertension. B) stroke. C) coronary artery disease. D) myocardial infarction. E) All of the answers are correct. E 37. A vein that measures 5 mm would be considered A) a large vein. B) a venule. C) a medium vein. D) an arteriovenule. E) a venous valve. C 38. The inferior vena cava is classified as a(n) A) large vein. B) venule. C) medium vein. D) arteriovenule. E) venous valve. A 39.

Which of the following are the smallest venous vessels? A) large veins B) venules C) medium veins D) arteriovenules E) venous valves B 40. 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) pumping by the smooth muscle in the wall of the vein. C) the respiratory pump. D) valves in the veins preventing the backward flow of blood. E) muscular compression. B 41. Metabolites exchange by diffusion with tissue cells in which of the following locations? A) artery B) arteriole C) capillary D) venule E) vein C 42. Which part of the vascular system functions as a blood reservoir and contains over 60% of the body's blood? A) pulmonary arteries B) capillaries C) systemic arterioles D) veins E) arteries D Upgrade to remove ads Only $0.99/month 43. The main control of peripheral resistance occurs in the A) arterioles. B) venules. C) veins. D) arteries.

E) capillaries. A 44. The small vessels that capillaries drain into are called A) arterioles. B) venules. C) arteries. D) veins. E) capillaries. B 45. Resistance is a force that A) increases blood flow. B) decreases blood flow. C) never changes in a blood vessel. D) acts with pressure to move blood along a vessel. E) is always higher than blood pressure. B 46. Total peripheral resistance is related to all of the following, except the A) length of a blood vessel. B) osmolarity of interstitial fluids. C) turbulence. D) blood viscosity. E) blood vessel diameter. B 47. As blood travels from arteries to veins, A) pressure builds. B) pressure drops. C) flow becomes turbulent. D) viscosity increases. E) diameter of the blood vessels gets progressively smaller. B...