title: Studies of the triad. 3. Structure of the junction in fast twitch fibers.
mesh_terms: D000400:Air Sacs / Q000166:cytology; D000818:Animals; D001001:Anura; D002415:Cats; D005399:Fishes; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009132:Muscles / Q000166:cytology*; D012519:Sarcoplasmic Reticulum