The exaggerated response of the immune system in which IgE type of antibody is called

Options

A. Allergy
B. Auto immunity
C. Active immunity
D. Passive immunity

Answer

To solve the question regarding the exaggerated response of the immune system in which IgE type of antibody is involved, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about a specific immune response characterized by an exaggerated reaction involving IgE antibodies.

2. **Identifying IgE's Role**: Immunoglobulin E (IgE) is a type of antibody that plays a crucial role in the immune system, particularly in allergic reactions. It is produced in response to allergens.

3. **Recognizing Allergens**: Allergens are substances that can cause an allergic reaction. Common allergens include pollen, dust mites, pet dander, and certain foods.

4. **Mechanism of Action**: When an allergen enters the body, it binds to IgE antibodies that are attached to mast cells and basophils. This binding triggers these immune cells to release various chemicals, including histamine.

5. **Resulting Symptoms**: The release of histamine and other chemicals leads to symptoms such as itching, swelling, redness, and other signs of an allergic reaction. This exaggerated immune response is what we commonly refer to as an allergy.

6. **Evaluating Options**: The options provided are:
- Allergy
- Autoimmunity
- Active immunity
- Passive immunity

Among these, "allergy" is the correct answer as it directly relates to the exaggerated immune response mediated by IgE.

7. **Conclusion**: The exaggerated response of the immune system in which IgE type of antibody is involved is called **allergy**.

### Final Answer:
The exaggerated response of the immune system in which IgE type of antibody is called **allergy**.