title: Information transfer in cell activation.
mesh_terms: D000262:Adenylyl Cyclases / Q000502:physiology; D000818:Animals; D001665:Binding Sites; D002118:Calcium / Q000502:physiology; D002462:Cell Membrane / Q000502:physiology*; D000242:Cyclic AMP / Q000502:physiology; D004789:Enzyme Activation; D006160:Guanosine Triphosphate / Q000502:physiology; D006728:Hormones / Q000502:physiology*; D007257:Information Theory; D011494:Protein Kinases / Q000502:physiology; D011956:Receptors, Cell Surface / Q000502:physiology; D011955:Receptors, Drug / Q000502:physiology*
chemical_list: D006728:Hormones; D011956:Receptors, Cell Surface; D011955:Receptors, Drug; D006160:Guanosine Triphosphate; D000242:Cyclic AMP; D011494:Protein Kinases; D000262:Adenylyl Cyclases; D002118:Calcium