20 The Lymphatic System and Lymphoid Organs and Tissues

Lymphatic vessels _______. collect excess fluid from interstitial spaces drain blood from lymph nodes are part of the venous system are built like arteries Answer: a. collect excess fluid from interstitial spaces © 2013 Pearson Education, Inc.

Lymphatic vessels _______. collect excess fluid from interstitial spaces drain blood from lymph nodes are part of the venous system are built like arteries Answer: a. collect excess fluid from interstitial spaces © 2013 Pearson Education, Inc. 3

Lymphatic capillaries owe their permeability to the presence of _______. an open end that siphons fluid from the interstitial fluid minivalves in their walls tight junctions between adjacent cells proteins in the lymph fluid Answer: b. minivalves in their walls © 2013 Pearson Education, Inc.

Lymphatic capillaries owe their permeability to the presence of _______. an open end that siphons fluid from the interstitial fluid minivalves in their walls tight junctions between adjacent cells proteins in the lymph fluid Answer: b. minivalves in their walls © 2013 Pearson Education, Inc. 5

Which of the following represents a logical sequence of structures that contribute to the return of fluid into the blood via the lymphatic system? Blood capillaries, arteries, lymphatic vessels, subclavian vein Arteries, lymphatic vessels, blood capillaries, subclavian vein Arteries, blood capillaries, lymphatic vessels, subclavian vein Subclavian vein, arteries, blood capillaries, lymphatic vessels Answer: c. Arteries, blood capillaries, lymphatic vessels, subclavian vein © 2013 Pearson Education, Inc.

Which of the following represents a logical sequence of structures that contribute to the return of fluid into the blood via the lymphatic system? Blood capillaries, arteries, lymphatic vessels, subclavian vein Arteries, lymphatic vessels, blood capillaries, subclavian vein Arteries, blood capillaries, lymphatic vessels, subclavian vein Subclavian vein, arteries, blood capillaries, lymphatic vessels Answer: c. Arteries, blood capillaries, lymphatic vessels, subclavian vein © 2013 Pearson Education, Inc. 7

Which of the following contribute(s) to the flow of lymph through lymphatic vessels? The pumping of the heart The milking action of skeletal muscle contraction Pressure changes in the thorax that result from breathing Both b and c Answer: d. Both b and c © 2013 Pearson Education, Inc.

Which of the following contribute(s) to the flow of lymph through lymphatic vessels? The pumping of the heart The milking action of skeletal muscle contraction Pressure changes in the thorax that result from breathing Both b and c Answer: d. Both b and c © 2013 Pearson Education, Inc. 9

Which of the following would the body perceive as an antigen? Bacteria Virus Mismatched red blood cell All of the above Answer: d. All of the above © 2013 Pearson Education, Inc.

Which of the following would the body perceive as an antigen? Bacteria Virus Mismatched red blood cell All of the above Answer: d. All of the above © 2013 Pearson Education, Inc. 11

An advantage to having reticular connective tissue present in lymph nodes is that ________. the loose organization of reticular connective tissue provides niches for macrophages and lymphocytes lymph filters through the nodes and is exposed to lymphocytes and macrophages lymphocytes cycle to various areas of the body and back to lymph nodes all of the above take place Answer: d. all of the above take place © 2013 Pearson Education, Inc.

An advantage to having reticular connective tissue present in lymph nodes is that ________. the loose organization of reticular connective tissue provides niches for macrophages and lymphocytes lymph filters through the nodes and is exposed to lymphocytes and macrophages lymphocytes cycle to various areas of the body and back to lymph nodes all of the above take place Answer: d. all of the above take place © 2013 Pearson Education, Inc. 13

Lymph tends to stall inside lymph nodes. This is due to _______. small-diameter spaces within the medulla the large volume of lymph entering the node fewer efferent lymphatic vessels than afferent lymphatic vessels fewer afferent lymphatic vessels than efferent lymphatic vessels Answer: c. fewer efferent lymphatic vessels than afferent lymphatic vessels © 2013 Pearson Education, Inc.

Lymph tends to stall inside lymph nodes. This is due to _______. small-diameter spaces within the medulla the large volume of lymph entering the node fewer efferent lymphatic vessels than afferent lymphatic vessels fewer afferent lymphatic vessels than efferent lymphatic vessels Answer: c. fewer efferent lymphatic vessels than afferent lymphatic vessels © 2013 Pearson Education, Inc. 15

Buboes are inflamed, swollen _______. tonsils thymus spleen lymph nodes Answer: d. lymph nodes © 2013 Pearson Education, Inc.

Buboes are inflamed, swollen _______. tonsils thymus spleen lymph nodes Answer: d. lymph nodes © 2013 Pearson Education, Inc. 17

_______ can enter lymphatic capillaries. Bacteria Large proteins Interstitial fluid All of the above Answer: d. All of the above © 2013 Pearson Education, Inc.

_______ can enter lymphatic capillaries. Bacteria Large proteins Interstitial fluid All of the above Answer: d. All of the above © 2013 Pearson Education, Inc. 19

The ______ is the largest lymphoid organ. lymph node spleen thymus tonsil Answer: b. spleen © 2013 Pearson Education, Inc.

The ______ is the largest lymphoid organ. lymph node spleen thymus tonsil Answer: b. spleen © 2013 Pearson Education, Inc. 21

Red pulp of the spleen is most concerned with _______, while white pulp is most concerned with _________. immunity; new red blood cell formation filtering lymph; T lymphocyte formation blood filtering; immunity urine formation; blood filtering Answer: c. blood filtering; immunity © 2013 Pearson Education, Inc.

Red pulp of the spleen is most concerned with _______, while white pulp is most concerned with _________. immunity; new red blood cell formation filtering lymph; T lymphocyte formation blood filtering; immunity urine formation; blood filtering Answer: c. blood filtering; immunity © 2013 Pearson Education, Inc. 23

Which of the following lymphoid tissues removes defective red blood cells from the blood? Lymph node Thymus Spleen Peyer's patches Answer: c. Spleen © 2013 Pearson Education, Inc.

Which of the following lymphoid tissues removes defective red blood cells from the blood? Lymph node Thymus Spleen Peyer's patches Answer: c. Spleen © 2013 Pearson Education, Inc. 25

The thymus is important for _______. T lymphocyte maturation removal of foreign antigens B lymphocyte maturation secretion of hormones that promote B lymphocyte immunocompetence Answer: a. T lymphocyte maturation © 2013 Pearson Education, Inc.

The thymus is important for _______. T lymphocyte maturation removal of foreign antigens B lymphocyte maturation secretion of hormones that promote B lymphocyte immunocompetence Answer: a. T lymphocyte maturation © 2013 Pearson Education, Inc. 27

Tonsils promote memory of pathogens by ________. secreting antibodies into the blood trapping food particles to support bacterial growth trapping pathogens so lymphocytes can encounter them and develop immune cells with memory producing B lymphocytes Answer: c. trapping pathogens so lymphocytes can encounter them and develop immune cells with memory © 2013 Pearson Education, Inc.

Tonsils promote memory of pathogens by ________. secreting antibodies into the blood trapping food particles to support bacterial growth trapping pathogens so lymphocytes can encounter them and develop immune cells with memory producing B lymphocytes Answer: c. trapping pathogens so lymphocytes can encounter them and develop immune cells with memory © 2013 Pearson Education, Inc. 29

Which lymphoid organ is not derived from mesodermal mesenchymal cells? Lymph nodes Thymus Spleen Lymphatic vessels Answer: b. Thymus © 2013 Pearson Education, Inc.

Which lymphoid organ is not derived from mesodermal mesenchymal cells? Lymph nodes Thymus Spleen Lymphatic vessels Answer: b. Thymus © 2013 Pearson Education, Inc. 31