TOPICS: M1 (muscarinic 1) receptor, acetylcholine, brain, higher cognitive functions, memory, gq protein, pip2, ip3, dag, gastric acid, M2 (muscarinic 2) receptor, heart, gi protein, cAMP, heart rate, contractility, M3 (muscarinic 3) receptor, gq protein, calcium, peristalsis, bronchoconstriction, vasodilation, hypotension, salivary secretions, sweat, urine voiding, detrusor muscle, insulin, pupillary sphincter muscle, miosis, accomodation, ciliary muscle
