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[Role of acetylcholine in the Ca2+-dependent regulation of functional activity of myocardium of frog Rana temporaria].

To study role of ACh in the Ca2+-dependent regulation of rhythm and strength of cardiac contractions in frog Rana temporaria, the ACh chrono- and inotropic effects have been studied in parallel experiments on the background of blockers of potential-controlled Ca2+-channels, ryanodine and muscarine receptors. The obtained results indicate participation of acetylcholine in the Ca2+-dependent regulation of rhythm and strength of frog cardiac contractions.