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A person shows strong unusual hypersensi...

A person shows strong unusual hypersensitive reactions when exposed to certain substances present in the air. Indentify the condition. Name the cells respondible for such reactions. What precaution should be taken to avoid such reactions.

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(a) A condition with hypersensitive response to antigens is called allergy.
(b) Cells responsible for hypersensitive response are mast cells of connective tissue.
(c) Allergic responses can be prevented by:
(i) Identifying and avoiding the allergen.
(ii) Use of antihistamine, adrenaline and steroid drugs to neutralise allergy-causing histamine.
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