what do Muscarinic acetylcholine receptors do
Molecular Physiology of Muscarinic Receptors (Optional Reading). Muscarinic acetylcholine receptors --- like nicotinic receptors -- are proteins that extend through the cell membrane from the outside to the inside. However, they do not contain channels to allow ions inside the cell.uscarinic, G-Protein Mediated Receptors. The key response differences between muscarinic and nicotinic receptors is that the response of muscarinic receptors: (Hoffman and Taylor 2001). 1  Is slower. 2  May be excitatory or inhibitory.