Surfactant is secreted by_____________?
Correct answer: B. Pnemocyte II
- A. Pnemocyte I
- B. Pnemocyte II
- C. Goblet cells
- D. Pulmonary vessels
Explanation
Type II pneumocytes synthesize and release pulmonary surfactant, which lowers alveolar surface tension and helps prevent alveolar collapse. Type I pneumocytes mainly form the thin gas-exchange surface.
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