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Energy to Power Muscles

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Energy to Power Muscles

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    1. Energy to Power Muscles By Elizabeth Hadley Grades 10-12

    2. How our muscles are powered Aerobic Respiration Anaerobic Respiration Phosphocreatine Lactic Acid Fermentation Muscle Fatigue

    3. Aerobic Respiration Muscles first choice in obtaining energy Most efficient way to obtain ATP to power the muscle cell Takes place in the presence of oxygen Occurs during normal, non strenuous muscle activity

    4. Benefits to aerobic exercise Aerobic exercise thus becomes a great booster to muscle performance because the switch to anaerobic respiration is delayed

    5. Anaerobic Respiration In anaerobic respiration the net yield of ATP molecules is much less than in aerobic respiration Less efficient power source Types of anaerobic respiration Phosphocreatine Lactic Acid Fermentation

    6. Phosphocreatine High energy molecule available in the cell to take over when the oxygen supply has been exhausted When the circulatory system is unable to keep up with the muscles demand for oxygen This occurs during strenuous muscle activity

    7. Lactic Acid Fermentation Occurs when the supply of oygen and phosphocreatine has been exhausted This method of obtaining energy as a side effect lactic acid Lactic acid build up in the muscle is what makes the muscle sore

    8. Muscle Fatigue At some point, if the muscle is continually being taxed, all of the sources of energy will have been used up As the lactic acid builds up to a critical point, the muscle is unable to contract any longer Muscle fatigue has been reached The muscle must get rid of the lactic acid, over a period of time and recover, so that it can contract again later

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