Anatomy Practice Exam 2026 - Free Anatomy Practice Questions and Study Guide

Insulin is a hormone produced by the pancreas, specifically by the beta cells located in the islets of Langerhans. It plays a crucial role in regulating blood glucose levels by facilitating the uptake of glucose into cells for energy production and storage, thus lowering blood sugar levels. When blood glucose levels rise, such as after a meal, the pancreas releases insulin to help maintain homeostasis.

In contrast, epinephrine is produced by the adrenal glands, cortisol is also produced by the adrenal glands as a response to stress, and thyroxine is produced by the thyroid gland. Each of these hormones serves different functions in the body, highlighting the specific role that insulin plays in glucose metabolism and energy regulation. This is why insulin is the correct answer regarding hormones produced by the pancreas.