muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors Acetylcholine receptors: muscarinic and nicotinic muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors muscarinic vs nicotinimc acetylcholine receptors nicotinic receptors muscarinic vs nicotinimc acetylcholine receptors