Antibodies involved in allergy reactions are

Options

A. Ig A type
B. Ig M type
C. Ig D type
D. Ig E type

Answer

**Step-by-Step Solution:**

1. **Understanding Allergies:**
- Allergies are immune responses triggered by foreign substances known as allergens. Common allergens include dust, pollen, animal hair, and certain foods.

2. **Immune Response:**
- When an allergen enters the body, the immune system reacts by producing antibodies. These antibodies are proteins that help identify and neutralize foreign invaders.

3. **Identifying the Antibody:**
- The specific antibody involved in allergic reactions is Immunoglobulin E (IgE).

4. **Function of IgE:**
- IgE antibodies bind to allergens and trigger the release of chemicals such as histamines from mast cells, leading to allergy symptoms like sneezing, itching, and inflammation.

5. **Reviewing Other Antibodies:**
- To confirm that IgE is the correct answer, let's briefly review other types of antibodies:
- **IgM:** Mainly found in blood and is the first antibody produced in response to an infection.
- **IgD:** Found on the surface of B cells (a type of white blood cell) and plays a role in regulating the immune response.
- **IgG:** The most abundant antibody in the blood, providing long-term protection against pathogens.

6. **Conclusion:**
- Based on the information, the antibody specifically involved in allergic reactions is **IgE**.

**Final Answer: IgE**

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