Allergies

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…