Biology - B2 4.3 Anaerobic respiration

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  • If muscles work hard for a long time they become fatigued and don't contract efficiently. If they don't get enough oxygen they will respire anaerobically. If you are unfit, your muscles will run short of oxygen much sooner than if you are fit.
  • Anaerobic respiration is respiration without oxygen. Glucose is incompletely broken down to form lactic acid. Using your muscle fibres vigorously for a long time can make them become fatigued. One cause of muscle fatigue is the build up…


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