<prompt> Cholinergic receptors on blood vessel endothelium-MlM2M3Nm  <response>: 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. 