What is the reason active skeletal muscle forms lactate through lactic acid fermentation? . Skeletal muscles don’t have enough time to relax. B. Lactic acid is an unstable acid. C. The level of glucose is too high. D. The rate of glycolysis exceeds the rate at which muscle can process pyruvate aerobically. E. There is not enough hemoglobin in blood during the work of active skeletal muscle.
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Step 1: Lactic acid is produced by fermentation of pyruvate during intense exercise. Show more…
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When a muscle becomes anaerobic during strenuous exercise, why is it necessary to convert pyruvate to lactate? a. to decrease $\mathrm{NAD}^{+}$ and increase $\mathrm{NADH}$ b. to decrease NADH and increase $\mathrm{NAD}^{+}$ c. to increase NADH and increase $\mathrm{NAD}^{+}$ d. to decrease NADH and decrease NAD $^{+}$ e. to keep oxidative phosphorylation running
When conditions in a muscle become anaerobic during strenuous exercise, why is it necessary to convert pyruvate to lactate? a. to decrease $\mathrm{NAD}^{+}$ and increase $\mathrm{NADH}$ b. to decrease NADH and increase NAD $^{+}$ c. to increase NADH and increase NAD $^{+}$ d. to decrease NADH and decrease NAD $^{+}$ e. to keep oxidative phosphorylation running
During lactic acid fermentation, which of the following events is least likely to occur? (A) An oxygen debt builds. (B) NADH is reduced. (C) Lactate accumulates in the muscle tissue. (D) ATP is produced. (E) $\mathrm{NAD}^{+}$ is recycled and returns to the Krebs cycle.
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