title: Calcium and cyclic nucleotides as universal second messengers.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000262:Adenylyl Cyclases / Q000378:metabolism; D000313:Adrenal Medulla / Q000378:metabolism*; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D000242:Cyclic AMP / Q000378:metabolism*; D006152:Cyclic GMP / Q000378:metabolism; D004721:Endoplasmic Reticulum / Q000378:metabolism; D004837:Epinephrine / Q000378:metabolism / Q000494:pharmacology; D005088:Exocrine Glands / Q000378:metabolism*; D006636:Histamine Release; D008027:Light; D008407:Mast Cells / Q000378:metabolism; D008954:Models, Biological; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000378:metabolism; D010179:Pancreas / Q000378:metabolism; D010786:Photoreceptor Cells / Q000378:metabolism; D012469:Salivary Glands / Q000378:metabolism; D012701:Serotonin / Q000494:pharmacology
chemical_list: D012701:Serotonin; D000242:Cyclic AMP; D000262:Adenylyl Cyclases; D006152:Cyclic GMP; D000109:Acetylcholine; D002118:Calcium; D004837:Epinephrine