Question

(b) How do allergens enter human body?
(C) Explain scratch test.



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Answer 1

Answer:

Explanation:Allergens enter the body through four main routes: the airways, the skin, the gastrointestinal tract, and the circulatory system. Airborne allergens cause the sneezing, runny nose, and itchy, bloodshot eyes of allergic rhinitis (hay fever). ... The most common airborne allergens are the following: plant pollens.

Answer 2

Answer:

Medical Definition of Scratch test for allergy

Scratch test for allergy: A test in which a small drop of the suspected allergy-provoking substance (allergen) is placed on the skin and the skin is then gently scratched through the drop with a sterile needle.