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In alveoli, surfactant is produced by...

In alveoli, surfactant is produced by

A

Type I pneumocyte

B

Type II pneumocyte

C

Kuffer's cells

D

Dust cells

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the specific cells in the alveoli that produce surfactant. 2. **Defining Surfactant**: Surfactant is a substance that reduces surface tension between two liquids or between a liquid and a gas. In the context of the lungs, it decreases the surface tension at the air-liquid interface in the alveoli. 3. **Identifying the Role of Surfactant**: Surfactant plays a crucial role in the respiratory system by preventing the collapse of alveoli and facilitating gas exchange. It helps maintain the structural integrity of the alveoli. 4. **Identifying the Cells in the Alveoli**: There are different types of cells in the alveoli, including type 1 pneumocytes, type 2 pneumocytes, and alveolar macrophages (also known as dust cells). 5. **Locating the Source of Surfactant**: Among these cells, it is specifically the type 2 pneumocytes that are responsible for the production of pulmonary surfactant. 6. **Final Answer**: Therefore, in the alveoli, surfactant is produced by **type 2 pneumocytes**. ---
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