title: The effect of sodium, calcium and magnesium on the amplitude of the action potential from giant neurons of Limnaea stagnalis.
mesh_terms: D000200:Action Potentials / Q000187:drug effects*; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D008274:Magnesium / Q000494:pharmacology*; D008433:Mathematics; D008954:Models, Biological; D009474:Neurons / Q000187:drug effects*; D012908:Snails; D012964:Sodium / Q000494:pharmacology*
chemical_list: D012964:Sodium; D008274:Magnesium; D002118:Calcium