State the functions of mast cells in allergy response.

Explanation

### Step-by-Step Text Solution:

1. **Understanding Allergy**:
- Allergy is defined as an exaggerated response of the immune system to certain substances known as allergens. Common allergens include dust, pollen, pet dander, and certain foods.

**Hint**: Remember that allergies are not just simple reactions; they involve the immune system overreacting to harmless substances.

2. **Role of Antibodies**:
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