respiration
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what do we need energy for?
• Muscle contraction • Protein synthesis • Cell division and growth • Active transport • Passage of nerve impulses • Maintenance of a constant body temperature
aerobic respiration
• Involves oxygen • Occurs in the mitochondria • Word equation: glucose + oxygen → carbon dioxide + water • Balanced chemical equation: C6H12O6 + 6O2 → 6CO2 + 6H2O
anaerobic respiration
• Does not involve oxygen in muscles: - Word equation: glucose → lactic acid in yeast: - Word equation: glucose → alcohol + carbon dioxide - Balanced chemical equation: C6H12O6→ 2C2H5OH + 2CO2
Actions taken by the body to remove lactic acid:
• Aerobic respiration in the liver to break down lactic acid into carbon dioxide and water • Maintaining a higher heart rate even after the exercise is finished to transport the lactic acid in the blood from the muscles to the liver • Maintaining deeper and faster breathing even after exercise has stopped so that oxygen is supplied to the liver so it can break down the lactic acid
oxygen debt
the amount of oxygen needed to break down lactic acid in the liver