1) Small organs associated with lymphatic vessels are termed ________. A) lymph follicles B) lymph nodes C) axillary nodes D) cisterna chyli
2) Which of the following would not be classified as a lymphatic structure? A) pancreas B) spleen C) tonsils D) Peyer"s patches of the intestine
3) The distal portion of the small intestine contains clumps of lymph follicles called ________. A) islets of Langerhans B) Peyer"s patches C) rugae D) villi
4) Both lymph and venous blood flow are heavily dependent on ________. A) the pumping action of the heart B) skeletal muscle contractions and differences in thoracic pressures due to respiratory movement C) contraction of the vessels themselves D) two-way valves
5) The thymus is most active during ________. A) fetal development B) childhood C) middle age D) old age
6) Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax? A) lumbar trunk B) thoracic duct C) right lymphatic duct D) cisterna chyli
7) What effect does age have on the size of the thymus? A) The size of the thymus increases continuously from birth to death. B) The size of the thymus decreases continuously from birth to death. C) The thymus is not affected by age. D) The thymus initially increases in size and then decreases in size from adolescence through old age.

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D) The thymus initially increases in size and then decreases in size from adolescence through old age.
8) The lymphatic capillaries are ________. A) more permeable than blood capillaries B) less permeable than blood capillaries C) as permeable as blood capillaries D) completely impermeable
9) Antibodies that act against a particular foreign substance are released by ________. A) T lymphocytes B) plasma cells C) lymph nodes D) medullary cords
10) Lymph leaves a lymph node via ________. A) efferent lymphatic vessels B) afferent lymphatic vessels C) the cortical sinus D) the subscapular sinus
11) Which cells become immunocompetent due to thymic hormones? A) basophils B) lymphocytes C) macrophages D) monocytes
12) Functions of the spleen include all of those below except ________. A) removal of old or defective blood cells from the blood B) forming crypts that trap bacteria C) storage of blood platelets D) storage of iron
13) When the lymphatic structures are blocked due to tumors, the result is ________. A) shrinkage of tissues distal to the blockage due to inadequate delivery of lymph B) severe localized edema distal to the blockage C) increased pressure in the lymphatics proximal to the blockage D) abnormally high lymph drainage from the distal region
14) Select the correct statement about lymph transport. A) Under normal conditions, lymph vessels are very high-pressure conduits. B) Lymph transport is faster than that occurring in veins. C) Lymph transport is only necessary when illness causes tissue swelling. D) Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.
15) Select the correct statement about lymphocytes. A) The two main types are T cells and macrophages. B) B cells produce plasma cells, which secrete antibodies into the blood. C) T cells are the precursors of B cells. D) T cells are the only form of lymphocyte found in lymphoid tissue.

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16) Select the correct statement about lymphoid tissue. A) Once a lymphocyte enters the lymphoid tissue, it resides there permanently. B) Lymphoid macrophages secrete antibodies into the blood. C) Lymphoid tissue is predominantly reticular connective tissue. D) T lymphocytes act by ingesting foreign substances.
17) Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________. A) tonsil B) thymus C) Peyer"s patch D) appendix
18) Which of the following is not a mucosa-associated lymphatic tissue? A) tonsil B) thymus C) Peyer"s patch D) appendix
19) Peyer"s patches are found in the ________. A) duodenum of the small intestine B) ileum of the small intestine C) large intestine D) jejunum of the small intestine
20) Lymph capillaries are absent in all but which of the following? A) bones and teeth B) bone marrow C) CNS D) digestive organs
21) What is a bubo? A) a wall in a lymph node B) a lobe of the spleen C) an infected Peyer"s patch D) an infected lymph node
22) The thymus is the only lymphoid organ that does not: A) have lymphocytes B) produce hormones C) have a cortex and medulla D) directly fight antigens
23) Large clusters of lymph nodes occur in all of the following locations except the ________. A) inguinal region B) cervical region C) axillary region D) lower extremities
24) Digestive tract-associated lymphatic tissue includes all of the following except ________. A) Peyer"s patches B) palatine tonsils C) lingual tonsils D) islets of Langerhans
25) Which of the following is not a method that maintains lymph flow? A) skeletal muscle contraction B) breathing C) valves in lymph vessel walls D) smooth muscle contraction
26) The tonsils located at the base of the tongue are the ________. A) lingual tonsils B) palatine tonsils C) pharyngeal tonsils D) Peyer"s tonsils
27) Which of the following is not a normal component of lymph? A) water B) plasma proteins C) red blood cells D) ions
28) A sentinel node is ________. A) a lymph node found in the intestinal lamina propria B) the first node at the junction of all the lumbar trunks C) a small node in the spleen D) the first node to receive lymph from an area suspected to be cancerous
29) Which of the following are functions of lymphoid tissue? A) house and provide a proliferation site for lymphocytes B) house and provide a proliferation site for neutrophils C) furnish an ideal surveillance vantage point for lymphocytes and macrophages D) A and C
30) Which of the following is not a function of the lymphatic system? A) draining excess interstitial fluid B) carrying out immune responses C) transporting dietary fats D) transporting respiratory gases
31) Which of the following is not a function of lymph nodes? A) act as lymph filters and activate the immune system B) produce lymphoid cells and granular WBCs C) produce lymph fluid and cerebro-spinal fluid D) serve as antigen surveillance areas