Sliding Filament Model of Contraction
Muscle fibers in relaxed and contracted positions. Muscle tone ensures that even when at rest the muscle is at least partially contracted.
This diagram depicts muscle fibers in both contracted and relaxed positions. Terms include I-band, H-zone, Cap Z, Titin, Z-Disc, Myocin Head, Myocin Tail, Actin Filament, M-Line.
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