Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Glucose molecules are simple sugars that serve as primary energy sources for living organisms. They can be broken down during cellular respiration to provide energy for cells.
This hormone helps regulate blood sugar levels by allowing cells in the body to take in glucose. Insulin is like the key that unlocks your car’s fuel tank so it can be filled with gas (glucose).