This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'A primigravida with 38 completed weeks of gestation has gone into labor. Oxytoxin was staed to augment labor. The second messenger system through which oxytoxin acts is ? \nSelect and explain. \nA. cAMP, B. Phospholipase, C. cGMP, D. Tyrosine kinase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The second messenger system through which oxytoxin acts in phospoholipase C mechanism. Hormones acting IP3- DAGor phospholipase C pathway: Acetylcholine (muscuranic) Angiotensin II ] ADH (V1 receptor ) a1 receptor adrenergic hormones Cholecystokinin Gastrin GnRH Oxytoxin TRH GHRH Substance P Ref: internet sources', 'role': 'assistant'}]