In alveoli, surfactante in produced by

Options

A. Type I pneumocyte
B. Type II pneumocyte
C. Kuffer's cells
D. Dust cells

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Alveoli**: The alveoli are small sac-like structures in the lungs that are primarily responsible for the exchange of gases (oxygen and carbon dioxide) between the air and the blood.

2. **Identifying the Types of Cells in Alveoli**: There are two main types of cells in the alveoli:
- Type 1 pneumocytes: These cells make up about 95% of the alveolar surface and are primarily involved in the process of gas exchange.
- Type 2 pneumocytes: These cells are fewer in number and play a crucial role in producing surfactant.

3. **Function of Surfactant**: Surfactant is a substance that reduces surface tension in the alveoli, preventing their collapse and facilitating easier gas exchange. It also helps in the dissolution of mucus present in the alveoli, ensuring that the airways remain clear for efficient breathing.

4. **Production of Surfactant**: The surfactant is specifically produced by the type 2 pneumocytes in the alveoli. This is the key point needed to answer the question.

5. **Conclusion**: Therefore, the correct answer to the question "In alveoli, surfactant is produced by" is the type 2 pneumocytes.

**Final Answer**: Surfactant in the alveoli is produced by type 2 pneumocytes.

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