Which of the following is true regarding glycogen depletion during vigorous exercise?

Question

Quizplus · Accepted Answer

During vigorous exercise, glycogen is first depleted from the muscles and then from the liver. This is because the muscles are the primary site of glucose fuel utilization during exercise, and therefore, they will use up their glycogen stores more quickly. Once muscle glycogen is depleted, the liver can release glucose into the bloodstream to be used as fuel by the muscles, but eventually, the liver's glycogen stores will also be depleted if exercise continues. Therefore, D is the correct answer. A is incorrect because exercise does indeed affect glycogen supplies. B is incorrect because glycogen depletion rates are not equal between the muscle and liver. C is incorrect because glycogen is actually depleted first from the muscles, not the liver.

Which of the Following Is True Regarding Glycogen Depletion During