Final answer:
The body first wants to use glucose as its primary source of energy. Glucose is broken down through a process called glycolysis, which produces ATP for cellular energy.
Step-by-step explanation:
The body first wants to use glucose as its primary source of energy. Glucose is broken down through a process called glycolysis, which transfers some of the energy in glucose to form ATP. ATP is the usable form of energy for cells, and it is used to power cellular processes.