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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Which muscarinic receptor causes dilatation of vessels?
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The correct answer is  Ans. is 'c' i.e., M3(Ref: Rapid Review of Physiology p.j32)M3 receptors are found in vessels (endothelium).Activation of these receptors causes vasodilation by release of EDRF(NO).Unique muscarinic receptors in that their activation does not cause release of acetylcholine, rather causes release of EDRF(NO).