🧬ap biology review

Insulin

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Insulin is a hormone produced by the pancreas that regulates the amount of glucose in the blood. It allows cells to take in glucose from the bloodstream and use it as energy.