Question

Surfactant in alveoli is secreted by

• A. Dust cells
• B. Type I epithelial cells
• C. Type II epithelial cells
• D. Kupffer cells

Answer 1

The correct option is C Type II epithelial cells

There are three major types of cells in the alveolar wall. Type I or squamous alveolar are cells forms the structure of the alveolar wall. Type II or great alveolar are cells that secrete pulmonary surfactant to lower the surface tension of water. This allows the membrane to separate and therefore, increases the capability of the cells to exchange gases.

Thus, the answer is correct option C.