An electron microscopic and histochemical study of fast and slow muscle fiber types in Chamaeleo chamaeleo recticrista

Abstract EN

The muscle fibers in the iliofibularis of die chanicleon, Chamaeleo ehamaelco recticrista were classified as fast anti slowon the basis of their cytoiogical and ultra-structural properties.

The fact fibers were stained dark when incubated for myofibrillar adenosine triphosphatase (rti-ATPase;:activity ::at-pi?:$■$.

.’However,: slow’ fibers stained light indicating low nyofibriiar ATPase activity, past fibers had obvious myofibrils (Fibrillenstruckture); aboundance of the sarcoplasmic rctieulirn (SR) and T-tubles: presence of M bands, and strailght Z-lines.

Howcver.

the ukrastructural organization of slow fibers were in sharp contrast to those of fast fibers which had fused myofibrils (Felderstrukture); poor development of sarcoplasmic reticulum and T-tubles; absence of VI-bands, and thick Z-iines.