Which of the following statements about pulmonary surfactant is false ?
Correct answer: C. It increases surface tension
- A. It is secreted by Type II pneumocytes
- B. It contains lecithin and sphingomyelin
- C. It increases surface tension
- D. It prevents collapse of smaller alveoli
Explanation
Surfactant is secreted by type II pneumocytes and contains phospholipids including lecithin; it lowers surface tension and prevents small alveoli from collapsing. Therefore, the statement that it increases surface tension is false.
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