Biol 1 - Pathogens

Revision notes on pathogens, aqa AS biology unit 1

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  • Created by: Stephanie
  • Created on: 12-05-12 14:17

Pathogens

A pathogen is an organ that causes disease
-can be bacteria, fungi or virus

Penetration: via interfaces with the environment

  • Gas-Exchange System
  • Digestive system
  • Skin (any wound or cut) 
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Infection

A pathogen can infect the body by either:

  • Secretion of harmful toxins
  • Damage to cells
    -rupturing
    -breaking down cells nutrients for own use
    -replicating inside a cell and bursting it 
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