Insulin and Glucagon | Physiology | Biology | FuseSchool

Summary

This video explains how the body regulates blood glucose levels using the hormones insulin and glucagon, secreted by the pancreas. It details how these hormones act on the liver to either store glucose as glycogen or release glucose into the bloodstream, maintaining optimal blood sugar levels.

Highlights

Introduction to Insulin and Glucagon00:00:13

This lesson focuses on how blood glucose levels are regulated by the hormones insulin and glucagon through a negative feedback system.

Insulin's Role in High Blood Glucose00:00:31

Consuming carbohydrate-rich foods increases blood glucose. The pancreas secretes insulin, which stimulates the liver to convert glucose into glycogen for storage and encourages body cells to absorb glucose, thus decreasing blood glucose levels back to normal. A faulty system can lead to diabetes.

Glucagon's Role in Low Blood Glucose00:01:36

When blood glucose levels drop, such as when hungry, the pancreas secretes glucagon. Glucagon targets the liver, stimulating it to break down glycogen back into glucose, which increases blood glucose levels to their optimal state.

Summary of Insulin and Glucagon Function00:01:55

In summary, insulin and glucagon are two hormones released by the pancreas that act on the liver to regulate our blood glucose level, maintaining equilibrium in the body.