Human Health and Diseases. — Bio Zoology STD 12 — Question
Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyHuman Health and Diseases.2 Marks
Question
Define allergy and allergen.
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Answer
The exaggerated response of the immune system to certain antigens present in the environment is called allergy (allo-altered, erg-reaction). The substances to which such an immune response is produced are called allergens.
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