Which of these substances contains chemical energy that is available instantly for muscle contraction?

Question

Quizplus · Accepted Answer

ATP (adenosine triphosphate) is the primary source of energy for muscle contraction and is readily available for immediate use. NAD (nicotinamide adenine dinucleotide), glucose, and fatty acids all play important roles in energy metabolism, but they must be converted into ATP before they can be used to fuel muscle contraction.

Which of These Substances Contains Chemical Energy That Is Available