Respuesta :
The identified bands on the sarcomere were shown to differ at various levels of muscle contraction and relaxation, leading to the development of the sliding filament theory of muscle contraction.
The binding of myosin to actin, which results in cross-bridges that cause filament movement, is the process of contraction.
The fibers in our muscles are what move our bodies. They also make it possible for our internal organs to function. According to experts, there are around 650 skeletal muscles in the human body. Muscles are specialized tissues with the ability to stretch, and each muscle has an infinite number of muscular fibers. Myofibrils are gradually smaller and thinner strands found in muscle fibers. Muscle contraction is necessary for movement. When tension-producing areas within the muscle fibers are stimulated, it contracts.
The sliding filament idea explains how this mechanism works. According to the sliding filament theory, actin and myosin filaments, which overlap each other during contraction of striated muscles, shorten the length of the muscle fibers. Cellular mobility is governed by actin (thin filaments) and myosin (thick filaments).
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