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BIOL 1003 (69)
Lecture

immune3.docx

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Department
Biology
Course
BIOL 1003
Professor
Elizabeth Nisbet
Semester
Fall

Description
TLymphocytes CellMediated ResponseVirus enter cell and more difficult to removeNo antibodies involvedwork directly on the infected cell by destroying itSpecial proteins called Major Histocompability Complex MHC are present on all human cellsNonself antigen interacts with MHC as human cell becomes infected by a pathogenSpecific Tlymphocyte recognises specific nonself antigen only with a chemical marker next to it MHCActivated Tlymphocytes multiply by mitosis and enter circulationCells differentiate into different types of cell o Cytotoxic TCells destroy pathogens and infected cells by enzyme action and secrete chemicals which attract and stimulate phagocytes o Helper TCells stimulate the activity of the cytotoxic TCells and Blymphocytes by releasing chemicals cytokines andinterleukins Destroyed by HIV o Suppressor T
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