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Related Flashcards
Cards In This Set
| Front | Back |
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Immunity is the ________ line of defense
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Third
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Immunity refers to
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Resistance to specific pathogens or their toxins or metabolic by-products
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Immunity is mediated by
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Lymphocytes Macrophages
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Immunity responds to
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Antigens
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Antigen is
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Foreign substance to which lymphocytes respond
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Haptens is
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Small molecules that cannot stimulate an immune response unless it is combined with larger molecules
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Haptens include
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Dustanimal danderpenicillinother drugs, household, and industrial chemicals
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Lympocytes originate in
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Red bone marrow
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Lymphocytes originate in red bone marrow during
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Fetal and embryonic life
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About ______ of lymphocytes are released into circulation as ________
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Halfundifferentiated lymphocytes
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Undifferentiated lymphocytes in ______ are specialized into __________
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ThymusT-cells
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____ to _____ % of T cells circulate into the blood
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70-80
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T cells are found in
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Lymphatic organs such as lymph nodes, thoracic duck, and white pulp of spleen
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Non-differentiated lymphocytes remain in the
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Red bone marrow
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Non-differentiated lymphocytes differentiate into
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B cells
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