Certified Dietary Manager (CDM) Practice Exam

What is glycogen primarily used for in the body?

1. Long-term energy storage

2. Quick energy supply

3. Synthesis of fatty acids

4. Digestion of sugars

The correct answer is: Quick energy supply

Glycogen serves as a significant energy reservoir for the body, primarily utilized during times of increased energy demand. When the body requires a quick source of energy, such as during physical activity or stress, glycogen is rapidly converted back into glucose through a process called glycogenolysis. The glucose can then be used by muscles and other tissues to fulfill immediate energy needs. This rapid mobilization of glycogen makes it the preferred source for quick energy supply, especially in activities that require short bursts of intense effort. Unlike fat, which takes longer to mobilize and convert into usable energy, glycogen can be accessed quickly, making it essential for maintaining energy levels during short-duration, high-intensity activities. Other options involve different aspects of metabolism or energy storage. For instance, glycogen is not primarily associated with long-term energy storage, which is more attributed to fats, nor is it mainly involved in the synthesis of fatty acids or the digestion of sugars. Thus, the primary role of glycogen is indeed to provide a swift energy supply to the body when needed.