IgE binds to which cell ?
**Core Concept**
IgE is a type of antibody that plays a crucial role in triggering allergic reactions and immunity against parasites. It binds to specific cells, which then mediate various immune responses.
**Why the Correct Answer is Right**
IgE binds to mast cells through its high-affinity receptor, FcεRI. This interaction is essential for the initiation of allergic reactions. When IgE-bound mast cells encounter an allergen, they undergo degranulation, releasing histamine and other chemical mediators, leading to symptoms such as itching, swelling, and increased mucus production.
**Why Each Wrong Option is Incorrect**
**Option A:** IgE does not bind to neutrophils, which are primarily involved in phagocytosis and are not typically associated with allergic reactions.
**Option B:** IgE does not bind to B cells, which are responsible for producing antibodies, but not directly involved in the binding of IgE.
**Option C:** IgE does not bind to eosinophils, which are involved in combating parasites and are not directly associated with the binding of IgE.
**Clinical Pearl / High-Yield Fact**
Mast cells are key players in allergic reactions, and their activation by IgE-bound FcεRI receptors is a crucial step in the development of symptoms. Understanding this mechanism is essential for managing allergies and developing effective treatments.
**Correct Answer: C. Mast cells**