BIOL 121 CHAPTER 22 THE CARDIOVASCULAR SYSTEM VESSELS AND CIRCULATION

BIOL 121 CHAPTER 22 THE CARDIOVASCULAR SYSTEM VESSELS AND CIRCULATION Human Anatomy, 7e (Martini/Timmons/Tallitsch) Chapter 22 The Cardiovascular System: Vessels and Circulation 1) The total length of blood vessels in the body is estimated to be A) 30 feet. B) 1 mile. C) thousands of miles. D) over a million miles. E) None of the answers are correct. Answer: C 2) Blood vessels, in correct order from the largest to the smallest, are: (1) capillaries (2) aorta (3) elastic arteries (4) arterioles (5) muscular arteries A) 1, 2, 3, 4, 5 B) 5, 4, 3, 2, 1 C) 2, 5, 3, 4, 1 D) 1, 3, 5, 2 or 1 E) 5, 3, 2 or 4, 1 Answer: C 3) The outermost layer of a blood vessel, which is very thick, composed chiefly of collagen fibers, with scattered bands of elastic fibers is the A) media. B) intima. C) external elastic membrane. D) adventitia. E) internal elastic membrane. Answer: D 4) Which of the following applies to elastic arteries? A) These vessels distribute blood to the skeletal muscles and internal organs of the body. B) They have a poorly defined adventitia. C) The media of these arteries contains a high density of elastic fibers and relatively few smooth muscle cells. D) The media consists of scattered smooth muscle fibers that do not form a complete layer. E) None of the answers are correct. Answer: C 5) Muscular arteries A) are larger than elastic arteries and smaller than arterioles.B) serve as the cushion to prevent sudden rises in blood pressure from causing trouble for the circulation. C) are exemplified by the aorta. D) have a thick media with a large amount of smooth muscle fiber within them. E) None of the answers are correct. Answer: D 6) Large veins include the A) superior vena cava. B) inferior vena cava. C) cephalic vein. D) brachial vein. E) superior and inferior venae cavae. Answer: E 7) Which of the following is true of an artery? A) The vessel walls are relatively thin. B) Blood flow is the slowest of all classes of vessels. C) The histological structure permits a two-way exchange of substances between the blood and body cells. D) It has a relatively thick media. E) All of the answers are correct. Answer: D 8) The outermost layer of a blood vessel is (the) A) adventitia. B) intima. C) media. D) endothelium. E) None of the answers are correct. Answer: A 9) Another name for muscular arteries is A) small arteries. B) elastic arteries. C) conducting arteries. D) distribution arteries. E) None of the answers are correct. Answer: D 10) Underneath the endothelium of arteries is a layer of A) smooth muscles. B) elastic fibers. C) collagen fibers. D) adipose tissue. E) None of the answers are correct. Answer: