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BIOLOGY TOPIC 11 ANIMAL PHYSIOLOGY (HL)
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Question:
What are the steps in fighting a pathogen? (6)
Author: Sammy UniverseAnswer:
1) non specific - macrophage engulf pathogens and breaks them down 2) dendritic cells have the antigen fragments and present them to specific T helper lympho which activates it 3) cytokines released 4) cytokines activate specific B cell to produce antibodies which divides and forms clones 5) clones become short lived plasma cells that produce a large quantity of an antibody 6) small group of clones become long living memory cells for immunity
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