Which of the following cells can realease heparin and histamine in the blood?

Options

A. Mast cells
B. Eosinophils
C. Mast cells and basophils
D. Eosinophils and mast cells

Answer

To determine which cells can release heparin and histamine in the blood, we can follow these steps:

### Step 1: Understand the Functions of Heparin and Histamine
- **Heparin** is an anticoagulant that prevents blood coagulation.
- **Histamine** is a vasodilator that increases the diameter of blood vessels, facilitating increased blood flow.

### Step 2: Identify the Cells Involved
- The cells responsible for the release of heparin and histamine are primarily **mast cells** and **basophils**.
- **Mast cells** are tissue cells found in the immune system and play a significant role in allergic reactions and inflammatory responses.
- **Basophils** are a type of white blood cell (leukocyte) that also participate in the immune response and contain heparin and histamine.

### Step 3: Analyze the Role of Each Cell Type
- **Mast Cells**:
- Found in tissues, particularly in areas prone to allergens.
- Release heparin and histamine during allergic reactions and inflammation.

- **Basophils**:
- Circulate in the blood and are involved in the immune response.
- Release heparin and histamine, especially during allergic reactions.

### Step 4: Conclusion
- Both **mast cells** and **basophils** can release heparin and histamine in the blood, particularly during allergic reactions and inflammatory responses.

### Final Answer
The cells that can release heparin and histamine in the blood are **mast cells and basophils**.

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