Allergies

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Unit 6 - allergies

Allergies

An allergy is an abnormal reponse of the immune system due to an otherwise harmless substance called allergens.

On the first exposure the allergen will; 

  • Be mistaken as a harmless substance by the B- Lymphocytes
  • The B-Lymphocytes produce antibodies designed to match the allergen.
  • They then release and attach themselves to mast cells
  • This sensitises the person to that allergen.
  • On second exposure the mast cells will produce histamine.

Airborne Allergies

Airborne allergies are breathed in and effects the mucus membrane and nasal cavities leading…

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