This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'The surfactant is produced by \nSelect and explain. \nA. Type I Pneumocytes, B. Type II Pneumocytes, C. Alveolar macrophages, D. Clara cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The smaller type II pneumocytes are often more numerous than type I pneumocytes, and they contribute less than 10% of the surface area.Their cytoplasm contains numerous characteristic secretory lamellar bodies. Ultrastructurally, the lamellar bodies are comprised of concentric whorls of the phospholipid-rich membrane, the precursors of alveolar surfactant. “Surfactant is stored in lamellar bodies and secreted in the form of tubular myelinby type II pneumocytes.', 'role': 'assistant'}]