Urticaria is a type 1 hypersensitivity reaction, which involves the release of histamine from mast cells and causes symptoms such as itching, swelling, and redness. It is not diagnosed with a cytological smear and is not characterized by shallow ulcerations. While it is an immunological reaction, it is not accurate to say that it is "not immunological," so D is not the correct answer.

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Urticaria Is

Question 49

Multiple Choice

Urticaria is:

A) Diagnosed with a cytological smear
B) Characterized by shallow ulcerations
C) A type 1 hypersensitivity reaction related to histamine production
D) Not immunological

Correct Answer: