In what form is food energy stored in your muscles?

• A. Protein
• B. Fatty acids
• C. Glycogen
• D. ATP

Answer: (C)

Verified step by step guidance

1. Understand that muscles store energy primarily in the form of glycogen, which is a polysaccharide composed of glucose units.
2. Recognize that glycogen serves as a readily available energy source during physical activity, as it can be quickly broken down into glucose.
3. Learn that ATP (adenosine triphosphate) is the immediate energy currency of the cell, but it is not stored in large quantities; instead, it is continuously regenerated from glycogen and other substrates.
4. Note that proteins and fatty acids are not the primary forms of energy storage in muscles. Proteins are mainly used for structural and functional purposes, while fatty acids are stored in adipose tissue and used for energy during prolonged activities.
5. Remember that the process of glycogenolysis involves the breakdown of glycogen into glucose-1-phosphate, which is then converted into glucose-6-phosphate to enter glycolysis and produce ATP.