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| Description: A cross section of muscle showing the molecular organization within the muscle fiber. In normal muscle (inset), dystrophin provides a flexible and elastic connection between actin and the muscle fiber plasma membrane that helps dissipate the force of muscle contraction. In Duchenne muscular dystrophy, dystrophin is absent, resulting in tearing of the plasma membrane during contraction and the subsequent death of muscle fibers. Muscle cell membrane / Actin (thin) filament Muscle filaments Muscle fiber (cell) Bundle of muscle fibers Picture Stats: Views: 225 Filesize: 255.89kB Height: 1021 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=44158 |