title: Metallic ions and habituation in the protozoan Spirostomum.
mesh_terms: D000818:Animals; D002122:Calcium Chloride / Q000494:pharmacology; D002712:Chlorides / Q000494:pharmacology; D016798:Ciliophora / Q000187:drug effects*; D003864:Depression, Chemical; D006185:Habituation, Psychophysiologic; D007858:Learning / Q000187:drug effects*; D008274:Magnesium / Q000494:pharmacology*; D008345:Manganese / Q000494:pharmacology*; D011189:Potassium Chloride / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology; D013997:Time Factors
chemical_list: D002712:Chlorides; D008345:Manganese; D012965:Sodium Chloride; D011189:Potassium Chloride; D008274:Magnesium; D002122:Calcium Chloride