title: Physiological studies of conducting systems in the colonial hydroid Hydractinia echinata 1. Polyp specialization.
mesh_terms: D000818:Animals; D002712:Chlorides / Q000494:pharmacology; D003063:Cnidaria / Q000187:drug effects / Q000502:physiology*; D004558:Electric Stimulation; D008274:Magnesium / Q000494:pharmacology; D009068:Movement; D009431:Neural Conduction; D012032:Refractory Period, Electrophysiological; D013360:Subliminal Stimulation
chemical_list: D002712:Chlorides; D008274:Magnesium