Which statement is NOT true of the energy sources for muscle contraction?
A)When ATP is used up, muscle fatigue begins.
B)Glycogen is a form of stored energy.
C)Glycogen is made from glucose.
D)Creatine phosphate is a secondary energy source.

Question

Quizplus · Accepted Answer

Muscle fatigue is not solely due to the depletion of ATP. It can also be caused by other factors such as the accumulation of lactic acid and other metabolic byproducts, depletion of glycogen stores, and failure of the muscle's electrical system. ATP levels are actually maintained quite well until very late in the fatigue process.

Which Statement Is NOT True of the Energy Sources for Muscle