Give a note on Allergy......
Answers
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Allergy occurs when a person's immune system reacts to substances in the environment that are harmless for most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medicines.
Atopy is the genetic (inherited) tendency to develop allergic diseases. People with atopy are said to be atopic.
When atopic people are exposed to allergens they can develop an immune reaction that leads to allergic inflammation (redness and swelling).
Answer-
✔Allergy is a hypersensitive reaction of the immune system to certain antigens present in the environment.
⭐Those agents which cause allergy are known as allergens.
✔Allergens produce immune response in an individual. Allergens may be pollen grains, dust, etc.
⭐Allergy occurs when chemicals like histamine and serotonin are released from the mast cells.
✔Symptoms of allergy are sneezing, watery eyes, running nose, difficulty in breathing.
⭐Antihistamine, adrenaline, and steroids are taken to reduce the symptoms of allergy.