Primary/secondary immune response
- Created by: jessicawarren
- Created on: 18-04-16 11:37
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- Primary/Secondary immune response
- Types
- Cellular: T-cells/other immune system cells they interact with e.g phagocytes
- Humoral: B cells, clonal selection and production of monoclonal antibodies
- Primary immune response
- 1) Antigen enters body first time, activates immune system
- 2) Slow, not many B cells that can make antibody
- 3) Eventually, body produces enough of right antibody to overcome infection. Infected person shows symptoms
- 4) T cells/B cells produce memory cells, which remain in body for long time. T cells remember specific antigen, B cells remember specific antibodies
- 5) Person immune- ability to respond quickly second time round
- Secondary immune response
- 1) If same pathogen enters body again, immune system produces quicker, stronger response
- 2) Clonal selection faster. Memory B cells activated, divide into plasma cells that produce antibody. Memory T cells activated, divide into correct type of T cells to kill antigen
- 3) Secondary response kills pathogen before symptoms shown
- Types
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