Asked by Shinobu

Which structure is composed of the filaments actin and myosin?


fascicle


myofibril


muscle fiber


sarcomere
Answered by PsyDAG
Actin and myosin proteins form filaments arranged in the myofibrils in a longitudinal manner. The main difference between actin and myosin is that actin forms a thin filament whereas myosin forms a thick filament. The sliding over of the two filaments over one another in a series of repetitive events leads to the contraction of the muscles.
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