title: [Ultrastructural changes in slow and intermediate frog muscle fibers during tonic contraction].
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001001:Anura; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009132:Muscles / Q000166:cytology / Q000187:drug effects; D009210:Myofibrils
chemical_list: D000109:Acetylcholine
vernacular_title: Izmenenie ul'trastruktury medlennykh i promezhutochnykh myshechnykh volokon liagushki pri tonicheskom sokrashchenii.