This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Bronchial mucosa secretes all except? \nSelect and explain. \nA. Bombesin, B. Calcitonin, C. Serotonin, D. Bradykinin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Bradykinin(Ref: Robbins 9th/pg 669-670)Bronchial mucosa contains neuroendocrine cells that have neurosecretory-type granules releasing: serotonin Q, calcitonin Q, and gastrin-releasing peptide (bombesin) Q', 'role': 'assistant'}]