This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cholinergic System, Subject name: Pharmacology
[{'content': 'Cholinergic receptors on blood vessel endothelium- \nSelect and explain. \nA. Ml, B. M2, C. M3, D. Nm', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., M3 o No direct cholinergic supply is present in blood vesselso But cholinergic receptor (M3 types) are present on blood vessels endothelium.o Stimulation of these receptors causes release of EDRF (NO) from endothelium resulting in vasodilatation.", 'role': 'assistant'}]