Immunity: Specific Defences
- Created by: Thea Tuckey
- Created on: 23-03-19 10:52
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- Antigen present cell (phagocyte with antigens from pathogen)
- Activate specific Th cells
- Pathogens with specific antigens
- Infected body cells displaying antigens
- Clonal selection; receptor that is complementary to shape of antigen
- Clonal expansion; Specific Th then divides by mitosis to make lots of Th cells
- More phagocytes stimulated to engulf pathogens
- Make memory Th cells for future infections
- Specific Tc cells activated
- Kills infected body cells or abnormal cells e.g. cancer
- Produces perforin protein to make holes in cell membranes causing death
- Kills infected body cells or abnormal cells e.g. cancer
- Specific B cells activated
- (antigen complementary to B cell receptor on cell membrane)
- Clonal expansion; Divides by mitosis
- Some become plasma cells
- Make antibodies to stop infection
- Some become memory cells
- Protect against future injections
- Specific Tc cells activated
- Kills infected body cells or abnormal cells e.g. cancer
- Produces perforin protein to make holes in cell membranes causing death
- Kills infected body cells or abnormal cells e.g. cancer
- Some become plasma cells
- Clonal expansion; Specific Th then divides by mitosis to make lots of Th cells
- Activate specific Th cells
- Cell mediated immunity (Tcells)
- Hummoral immunity
- KEY
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