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abbylola154 Nov 3 '16
Each muscle is a bundle of muscle fibers, wherein each cell is surrounded by connective tissue, muscle boost x where the lymph and blood vessels and nerve fibers. The peculiarity of the muscle fibers is that they contain up to a thousand or more myofibrils (long strands of protein nature). Each myofibril - about 2 thousand parallel molecules of two proteins (actin and myosin). Actin and myosin provide skeletal muscle contraction, moving relative to each other. Myosin has the ability to break down ATP with release of energy, which enables muscle contraction. In a relaxed muscle actin and myosin testo boost x do not interact. Muscle contraction - this convergence of molecules of actin and myosin in response to a nerve impulse. There are numerous power system development.


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