The Lymphatic System and Lymphoid Organs and Tissues 20 The Lymphatic System and Lymphoid Organs and Tissues

collect excess fluid from interstitial spaces. 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.

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.

Surgery always results in tissue swelling. Why would removal of lymph vessels from the right axillary region cause edema in the right arm? Excess blood plasma builds up in regions where there are no lymph vessels. Surgery always results in tissue swelling. Blood is inefficiently circulated in areas where surgery has occurred. Both b and c are true. Answer: a. Excess blood plasma builds up in regions where there are no lymph vessels.

Blood capillaries, arteries, lymphatic vessels, subclavian vein 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

The pumping of the heart 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

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

all of the above take place. An advantage to having reticular connective tissue present in lymph nodes would be 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.

The highest density of lymph nodes can be found ________. in the arms and legs in the brain at the locations where lymphatic collecting vessels converge in the intestines Answer: c. at the locations where lymphatic collecting vessels converge

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.

_________ can enter lymph capillaries. Bacteria Large proteins Interstitial fluid All of the above Answer: d. All of the above

The ______ is the largest lymphoid organ. lymph node spleen thymus tonsil Answer: b. spleen

immunity; new red blood cell formation 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

Which of the following lymphoid tissues removes defective red blood cells from the blood? Lymph node Thymus Spleen Peyer’s patches Answer: c. Spleen

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.

Tonsils promote memory of pathogens by: secreting antibodies into the blood. trapping food particles to support bacterial growth. trapping pathogens to develop immune cells with memory. producing B lymphocytes. Answer: c. trapping pathogens to develop immune cells with memory.