Depletion of muscle carbohydrate stores during exercise can decrease the ability of the muscle to metabolize fat by
A)decreasing the rate of muscle lactic acid production.
B)reducing the concentrations of citric acid cycle intermediates.
C)increasing the rate of protein metabolism.
D)reducing the rate of protein metabolism.

Question

Quizplus · Accepted Answer

Depletion of muscle carbohydrate stores can decrease the ability of the muscle to metabolize fat by reducing the concentrations of citric acid cycle intermediates. Carbohydrate is the primary fuel source for muscle metabolism during high-intensity exercise, and its depletion can lead to a decrease in the availability of the intermediates of the citric acid cycle, which is required for fat metabolism. Therefore, B is the best choice.

Depletion of Muscle Carbohydrate Stores During Exercise Can Decrease the Ability