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Locomotion and Movement — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYLocomotion and Movement1 Mark
Question
Why do muscles fatigue?
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Answer

The continuous contraction and relexation in muscles cause movement in organs. If it continues for longer time then anaerobic conditions are created in muscle cells and an aerobic respiration begins due to which lactic acid is formed. Thus, accumulation of lactic acid causes muscle fatigue. After taking some rest in some course of time liver degrades the lactic acid and person is relieved from pain.

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