4.6 Fermentation

• fermentation allows glycolysis to continue   * under normal conditions amount of oxygen is enough to allow cellular respiration to continue   * under exercise conditions oxygen is used up too fast     * causes an oxygen debt   * fermentation allows glycolysis to continue making ATP when oxygen is unavailable
• fermentation is an anaerobic process   * occurs when oxygen is not available for cellular respiration
• if you have no ATP, you die
• Lactic acid fermentation   * glycolysis splits glucose into two pyruvate molecule   * pyruvate and NADH enter fermentation   * Energy from NADH converts pyruvate into lactic acid   * NADH changed back into NAD+
• alcoholic fermentation is similar to lactic acid   * done by yeast and bacteria   * make alcohol instead of lactic acid
• fermentation used in yogurt, bread, alcoholic beverages, and cheese

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