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Skeletal Muscles
...  in the presence of stimulus. The contraction starts when calcium ions begin to leak from the endoplasmic reticulum. Due to the changes in the electrical potential inside and outside of the cell, the Muscle fibers begin to shorten. Collectively, they pull the bones to create motion. Muscle Fatigue Muscle fatigue is a normal phenomenon when your muscles experience too much stress. It happens to  ...

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