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The War of the Supes and the Sparks
There are two types of cholinergic receptors, one called nicotinic and one called muscarinic. They're all non-selective cation channels permeable to both sodium and potassium. Some antagonists are dexamethorphan, tuba curine, and toxins from snake venom. Acurinic receptors are the metatotropic, G-protein coupled receptors. These actually regulate both ion channels and sicket messenger pathways involving kinases and phosphatases,. which are enzymes.