Answer & Solution
Answer: Option
C
Solution:
The correct answer is Option A: Type I.
Let's break down why:
Hypersensitivity refers to an exaggerated or inappropriate immune response that can damage tissues.
There are four main types of hypersensitivity reactions, classified as Type I, Type II, Type III, and Type IV.
Type I hypersensitivity is also known as immediate hypersensitivity.
This type of reaction is mediated by IgE antibodies.
When someone is exposed to an allergen (like pollen or a bee sting) for the first time, their body might produce IgE antibodies specific to that allergen.
These IgE antibodies bind to mast cells and basophils.
Upon subsequent exposure to the same allergen, the allergen binds to the IgE antibodies on these cells, causing them to release histamine and other inflammatory mediators.
This release causes a rapid and severe allergic reaction, such as anaphylaxis.
Anaphylaxis is a severe, life-threatening allergic reaction that involves multiple organ systems.
Symptoms can include difficulty breathing, drop in blood pressure, hives, and swelling.
Because anaphylaxis is a rapid and IgE-mediated reaction, it falls under Type I hypersensitivity.
Types II, III, and IV are different types of hypersensitivity reactions that are not typically associated with anaphylaxis.
