title: Channel control.
mesh_terms: D000818:Animals; D015220:Calcium Channels / Q000502:physiology*; D000242:Cyclic AMP / Q000502:physiology; D019204:GTP-Binding Proteins / Q000502:physiology*; D006321:Heart / Q000502:physiology*; D051381:Rats; D011943:Receptors, Adrenergic, beta / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology
chemical_list: D015220:Calcium Channels; D011943:Receptors, Adrenergic, beta; D000242:Cyclic AMP; D019204:GTP-Binding Proteins