immune system

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  • Created by: Ailbhe
  • Created on: 06-03-14 09:21
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  • Stress and the Immune System
    • the immune system is out main defence against infection by foreign agents like bacteria and viruses
      • anything which stimulates a response from the immune system is called an antigen
      • the immune system is defensive and attacks antigens using both cells and proteins called antibodies =
    • the B cell finds an antigen which matches its receptors
      • it waits until it is activated by a helper T cell
        • then the B cell divides to produce plasma and memory cells
          • Plasma cell produce antibodies that attach to the current type of innvader
            • 'Eater cells' prefer intrudes marked with antibodies and 'eat' loads of them
              • if the same intruder invades again memory cells help the immune system to activate much faster

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