title: Ultrastructure and elemental composition of the stapedius muscle in guinea pig.
abstract: Muscules stapedius in guinea pig was investigated with regard to morphology and elemental composition. The muscle fibers are multinucleated, contain a high amount of ribosomes, and a centriole is often found adjacent to the cell nucleus. Intramitochondrial inclusion bodies occur adjacent to cristae mitochondriales. Both type I and type II fibres occur, the latter with all three subtypes. Elemental analysis from the myofibrillar area revealed unexpected low concentration of K and high concentrations of NA, P, and Ca.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism*; D003094:Collagen / Q000378:metabolism; D006168:Guinea Pigs; D008274:Magnesium / Q000378:metabolism*; D009119:Muscle Contraction; D009132:Muscles / Q000648:ultrastructure*; D010758:Phosphorus / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*; D013198:Stapedius / Q000378:metabolism / Q000648:ultrastructure*
chemical_list: D010758:Phosphorus; D003094:Collagen; D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium