Surfactant: How It Prevents Alveoli Collapse - Lung Health
The correct answer is Surfactant.
Explanation
- The inner surface of the alveoli is lined by type II pneumocytes that secrete surfactant.
- Surfactant is a complex mixture of lipids and proteins that reduces surface tension at the air-liquid interface in the alveoli.
- This prevents the alveoli from collapsing between breaths.
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