BIOL 121 CHAPTER 23 THE LYMPHOID SYSTEM

BIOL 121 CHAPTER 23 THE LYMPHOID SYSTEM Human Anatomy, 7e (Martini/Timmons/Tallitsch) Chapter 23 The Lymphoid System 1) Most immune responses originate in A) primary lymphoid structures. B) macrophages. C) the skin. D) secondary lymphoid structures. E) the liver. Answer: D 2) Which of the following are functions of the lymphoid system in the body? A) to maintain normal blood volume B) to eliminate local variations in the chemical composition of the interstitial fluid C) to produce lymphocytes D) to distribute lymphocytes E) All of the answers are correct. Answer: E 3) Components of the lymphoid system include the: (1) pancreas (2) spleen (3) lymphatic vessels (4) thymus (5) lymph nodes (6) thoracic duct A) 2, 3, 4, 5, 6 B) 1, 3, 5, 6 C) 1, 4, 6 D) All of the answers are correct. E) None of the answers are correct. 4) Secondary lymphoid structures may contain A) macrophages. B) lymphocytes. C) sinusoids. D) lymph. E) All of the answers are correct. Answer: E 5) The lymphoid system is composed of A) lymph. B) the spleen. C) lymph nodes.D) lymphatic vessels. E) All of the answers are correct. Answer: E 6) The smallest of the organs of the lymphoid system is (are) the A) lymph node. B) cisterna chyli. C) spleen. D) carotid bodies. E) kidneys. Answer: C 7) Each day about ________ of fluid moves from the plasma to the interstitial fluid. A) 500 mL B) 3.6 L C) 1.5 L D) 8.0 L E) None of the answers are correct. Answer: B 8) Lipids absorbed in the digestive tract enter ________ in the intestinal wall. A) capillaries B) lymph nodes C) lacteals D) macrophages E) None of the answers are correct. Answer: C 9) How do lymphatic vessels differ from those of either the arterial or the venous system? A) They do not run together with either the arteries or the veins. B) The lymphatic valves are spaced close enough to give the vessel the appearance of a string of beads. C) They have fewer valves than do the veins. D) They have thicker walls than veins, but less thick than those of the arteries. E) They have very few significant differences. Answer: B 10) Which lymphatic vessels drain into the venous system? A) lymphatic capillaries B) large lymphatic vessels C) lymphatic ducts D) lymphoid sacs E) lymphatic trunks Answer: C 11) Compared to regular capillaries, lymphatic capillaries are A) much less permeable. B) more permeable than continuous capillaries. C) not comparable because of their large size