# Surfactant is secreted by:
A. Pneumocyte I
B. Pneumocyte II
C. Goblet cells
D. Pulmonary vessels
The correct answer is B. Pneumocyte II.
Surfactant lowers the surface tension of the fluid lining of the alveoli and prevents the collapsing tendency of the lungs. It is a phospholipid. The absence of surfactant results in Hyaline membrane disease (or) respiratory distress syndrome.
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