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
Bronchial mucosa secretes all except? 
Select and explain. 
A. Bombesin, B. Calcitonin, C. Serotonin, D. Bradykinin
D: Bradykinin
Answer: D: Bradykinin 
Explanation: 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