This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Oxytocin causes all except: \nSelect and explain. \nA. Lactogenesis, B. Milk ejection, C. Contraction of uterine muscle, D. Myoepithelial cell contraction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A) Lactogenesis(Ref: Katzung 11/e p657; KDT 8/e p355)Important actions of oxytocin are:Contraction of uterine smooth muscle (directly by acting on GPCR and indirectly by release of PG and LTs).Milk ejection by contraction of myoepithelial cells surrounding mammary alveoli.At high concentration; anti-diuretic and vasopressor action can be seen.Note: Lactogenesis is the action of prolactin (not oxytocin)', 'role': 'assistant'}]