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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
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A) more permeable than blood capillaries
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The tonsils located at the base of the tongue are the ________.
A) lingual tonsils
B) palatine tonsils
C) pharyngeal tonsils
D) Peyer’s tonsils
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A) lingual tonsils
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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
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D) islets of Langerhans
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Which of the following is not a mucosa-associated lymphatic tissue?
A) tonsil
B) thymus
C) Peyer’s patch
D) appendix
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B) thymus
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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.
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C) Lymphoid tissue is predominantly reticular connective tissue
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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
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A) tonsil
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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
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B) ileum of the small intestine
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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
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C) produce lymph fluid and cerebra-spinal fluid
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Lymph leaves a lymph node via ________.
A) efferent lymphatic vessels
B) afferent lymphatic vessels
C) the cortical sinus
D) the subscapular sinus
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A) efferent lymphatic vessels
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Which cells become immunocompetent due to thymic hormones?
A) basophils
B) lymphocytes
C) macrophages
D) monocytes
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B) lymphocytes
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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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B) B cells produce plasma cells, which secrete antibodies into the blood
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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
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B) Skeletal muscle contractions and differences in thoracic pressures due to respiratory movement
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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) house and provide a proliferation site for lymphocytes and furnish an ideal surveillance vantage point for lymphocytes and macrophages
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D) house and provide a proliferation site for lymphocytes and furnish an ideal surveillance vantage point for lymphocytes and macrophages
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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
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D) an infected lymph node
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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
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B) forming crypts that trap bacteria
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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
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D) lower extremities
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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
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C) right lymphatic duct
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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
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D) transporting respiratory gases
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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.
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D) lymph transport depends on the movement of adjacent tissues, such as skeletal muscles
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The thymus is most active during ________.
A) fetal development
B) childhood
C) middle age
D) old age
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B) childhood
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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
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