Defence mechanisms

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  • Created by: Beth4
  • Created on: 31-12-14 10:36
Define immunity
When the body's defence systems have overwhelmed a pathogen and are better prepared for a 2nd infection. The body can repel it before it causes harm and symptoms
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Non-specific mechanisms
Don't distinguish between types of pathogen so respond to them all in the same way
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Examples of non-specific mechanisms
A barrier to entry of pathogens Phagocytosis
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Specific mechanisms
Do distinguish between different pathogens. The responses are slower but provide long lasting immunity. It involves a lymphocyte (type of white blood cell)
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Examples of specific mechanisms
Cell mediated responses involving T lymphocytes Humoral responses involving B lymphocytes
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How do lymphocytes recognise pathogens?
They have a protien on their surface that is complimentary to one of the proteins on the pathogen
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Card 2

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Non-specific mechanisms

Back

Don't distinguish between types of pathogen so respond to them all in the same way

Card 3

Front

Examples of non-specific mechanisms

Back

Preview of the front of card 3

Card 4

Front

Specific mechanisms

Back

Preview of the front of card 4

Card 5

Front

Examples of specific mechanisms

Back

Preview of the front of card 5
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