Ch. 20

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Section 1

Question Answer
1.Lymphatic vessels _______. a. collect excess fluid from interstitial spaces b. drain blood from lymph nodes c. are part of the venous system d. are built like arteriesa.collect excess fluid from interstitial spaces
2.Lymphatic capillaries owe their permeability to the presence of _______. a. an open end that siphons fluid from the interstitial fluid b. minivalves in their walls c. tight junctions between adjacent cells d. proteins in the lymph fluid b.minivalves in their walls
3._______ can enter lymphatic capillaries. a. Bacteria b. Large proteins c. Interstitial fluid d. All of the above d.All of the above
4.Fluid enters the lymphatic system directly from the _______. a. blood capillaries b. interstitial space c. lymph-collecting ducts d. lymphatic trunks b.interstitial space
5.Once fluid enters the lymphatic system it is called ________.Lymph
6.True or false: The lymphatic system transports lipids from GI tract to blood.True
7. Which of the following represents a logical sequence of structures that contribute to the return of fluid into the blood via the lymphatic system? a. Blood capillaries, arteries, lymphatic vessels, subclavian vein b. Arteries, lymphatic vessels, blood capillaries, subclavian vein c. Arteries, blood capillaries, lymphatic vessels, subclavian vein d. Subclavian vein, arteries, blood capillaries, lymphatic vessels c.Arteries, blood capillaries, lymphatic vessels, subclavian vein
8. Which of the following contribute(s) to the flow of lymph through lymphatic vessels? a. The pumping of the heart b. The milking action of skeletal muscle contraction c. Pressure changes in the thorax that result from breathing d. Both b and c d.Both b and c
9. These cells produce the fiber stroma of the lymphoid organs. a. Macrophages b. Dendritic cells c. Reticular cells d. Plasma cells c.Reticular cells
10. These cells are able to produce antibodies. a. T lymphocytes b. Plasma cells c. Macrophages d. Dendritic cellsb. Plasma cells
11. The function of the macrophages most closely resembles that of: a. Dendritic cells b. Reticular cells c. T cells d. Plasma cells a.Dendritic cells

Section 2

Question Answer
12. These cells populate the germinal centers of lymphoid follicles. a. T lymphocytes b. B lymphocytes c. Reticular cells d. Macrophages b.B lymphocytes
13. Lymph tends to stall inside lymph nodes. This is due to the_______. a. small-diameter spaces within the medulla b. the large volume of lymph entering the node c. fewer efferent lymphatic vessels than afferent lymphatic vessels d. fewer afferent lymphatic vessels than efferent lymphatic vessels c.fewer efferent lymphatic vessels than afferent lymphatic vessels
14. Which of the following lymphoid tissues removes defective red blood cells from the blood? a. Lymph node b. Thymus c. Spleen d. Peyer's patches c.Spleen
15. Red pulp of the spleen is most concerned with _______, while white pulp is most concerned with _________. a. immunity; new red blood cell formation b. filtering lymph; T lymphocyte formation c. blood filtering; immunity d. urine formation; blood filtering c.blood filtering; immunity
16. The thymus is important for _______. a. T lymphocyte maturation b. removal of foreign antigens c. B lymphocyte maturation d. secretion of hormones that promote B lymphocyte immunocompetencea.T lymphocyte maturation
17. Tonsils promote memory of pathogens by ________. a. secreting antibodies into the blood b. trapping food particles to support bacterial growth c. trapping pathogens so lymphocytes can encounter them and develop immune cells with memory d. producing B lymphocytes c.trapping pathogens so lymphocytes can encounter them and develop immune cells with memory
18. Which of the following tissues is not considered part of MALT? a. Peyer's patches b. Appendix c. Tonsils d. Spleend.Spleen
19. B cells are found in all of the following except the _______. a. Spleen b. Thymus c. Tonsils d. Appendixb. Thymus