Science Assessment

If the amount of glucose in a person’s blood were to drop too low during exercise, the person’s brain would not function properly and the person could faint. How does the person’s body maintain a stable amount of glucose in the blood during exercise?

1. The body speeds up the reaction during which glucose and oxygen react to form carbon dioxide and water.
2. The body makes glycogen molecules and water molecules from glucose molecules.
3. The body breaks down glycogen molecules into glucose molecules.
4. The only way to maintain blood glucose levels is to eat more glucose.