The immune system

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  • Created by: Alex
  • Created on: 15-05-11 11:59

FOREIGN ANTIGENS TRIGGER AN IMMUNE RESPONSE  Antigens are molecules found on the surface of cells. If a pathogen invades the body the antigens on the cell surface are identified as foreign. THE IMMUNE SYSTEM IS ACTIVATED.  FIRSTLY PHAGOCYTES TRIGGER AN IMMUNE RESPONSE  (http://leavingbio.net/The%20Human%20Defence%20System-web-2_files/image001.gif)

  • The phagocyte recognizes the antigens on the pathogen
  • The cytoplasm moves around the pathogen engulfing it 
  • A lymosome fuses with the vacuole and break down the pathogen
  • The phagocyte presents the pathogen's antigens on the surface to activate the immune system cells.

T Cells are then activated

  • This is a type of white blood cell
  • It has proteins on its surface that bind to

Comments

Dan

This has improved my understanding a lot - Thank you!!!

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