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: Physiology
[{'content': 'Over-inflation of the lung is prevented by? \nSelect and explain. \nA. Chemo-receptor, B. Hering- Breuer reflex, C. Surfactant, D. Clara cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Hering- Breuer reflex is reflex triggered to prevent over inflation of lung.\n• Smooth muscles of the lung have pulmonary stretch receptors which respond to excessive stretching of the lung during large inspirations.\n• The reflex limits the tidal volume while increasing the respiratory frequency\n• Hering Breuer inflation reflex increases in duration of expiration produced by steady lung inflation.\n• Hering breur deflation reflex is a decrease in the duration of expiration produced by steady lung deflation.\n• Surfactant prevents the collapse of the lung.', 'role': 'assistant'}]