Defence mechanisms

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  • Defence mechanisms
    • Non-specific
      • do not distinguish between one type of pathogen and another, but respond to all of them in the same way
      • The mechanisms act immediately and take two forms
        • a barrier to the entry of pathogens
        • phagocytosis
    • Specific
      • do distinguish between different pathogens
      • responses are less rapid but provide long lasting immunity
      • The responses involve a type of whit blood cell called a lymphocyte and take place in two forms
        • cell mediated responses involving T lymphocytes
        • humoral responses involving B lymphocytes


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