Which category of hypersensitivities is IgE-mediated? Question 4Select one: a. type 3 b. type 4 c. type 2 d. type 1

Answer

The category of hypersensitivities that is IgE-mediated is:

d. type 1

Explanation

Type 1 hypersensitivity reactions are immediate allergic responses that occur when an individual is exposed to an allergen for the first time, leading to the production of Immunoglobulin E (IgE) antibodies. This class of hypersensitivity is commonly associated with allergies such as hay fever, asthma, and anaphylaxis. Upon subsequent exposure to the same allergen, these IgE antibodies bind to mast cells and basophils, causing them to release histamine and other inflammatory mediators. This results in various symptoms ranging from mild irritation to severe and potentially life-threatening reactions.

In summary, when considering the options provided, type 1 hypersensitivity is clearly distinguished by its reliance on IgE antibodies, making it the correct choice.