Glycogen Is Stored in Liver and Muscle After absorption into a cell, glucose can be used immediately for release of energy to the cell, or it
can be stored in the form of glycogen, which is a large polymer of glucose.All cells of the body are
capable of storing at least some glycogen, but certain cells can store large amounts, especially liver cells, which can store up to 5 to 8 percent of their weight as glycogen, and muscle cells, which can
store up to 1 to 3 percent glycogen.
by the Glycolytic Pathway Because complete oxidation of 1 gram-mole of glucose releases
686,000 calories of energy and only 12,000 calories of energy are required to form 1 gram-mole of
ATP, energy would be wasted if glucose were decomposed all at once into water and carbon dioxide
while forming only a single ATP molecule. Fortunately, cells of the body contain special
proteinenzymes that cause the glucose molecule to split a little at a time in many successive steps, so
that its energy is released in small packets to form one molecule of ATP at a time, forming a total of 38
moles of ATP for each mole of glucose metabolized by the cells
