title: The effect of parathion on crustacean skeletal muscle. I. The mechanical threshold and dependence on Ca 2+  ions.
mesh_terms: D000818:Animals; D003386:Brachyura / Q000502:physiology*; D002118:Calcium / Q000008:administration & dosage / Q000494:pharmacology*; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects; D009132:Muscles / Q000187:drug effects / Q000502:physiology*; D010278:Parathion / Q000494:pharmacology*; D011189:Potassium Chloride / Q000008:administration & dosage / Q000494:pharmacology
chemical_list: D010278:Parathion; D011189:Potassium Chloride; D002118:Calcium