title: Calcium ions regulate cyclic AMP and beating in cultured heart cells.
mesh_terms: D002118:Calcium / Q000378:metabolism* / Q000494:pharmacology; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism*; D006321:Heart / Q000187:drug effects*; D009200:Myocardial Contraction / Q000187:drug effects*; D009206:Myocardium / Q000378:metabolism; D009638:Norepinephrine / Q000494:pharmacology
chemical_list: D000242:Cyclic AMP; D002118:Calcium; D009638:Norepinephrine