Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!
Print

Science

Homeostasis

Blood glucose regulation

Glucose is needed by cells for respiration. It is important that the concentration of glucose in the blood is maintained at a constant level. Insulin is a hormonehormone: chemical messengers produced in glands and carried by the blood to specific organs in the body produced by the pancreas that regulates glucose levels in the blood.

How glucose is regulated

Glucose levelEffect on pancreasEffect on liverEffect on glucose level
too high insulin secreted into the bloodliver converts glucose into glycogen goes down
too low insulin not secreted into the blood liver does not convert glucose into glycogen goes up

Use the animation to make sure you understand how this works.

Glucagon – Higher tier

The pancreas releases another hormone, glucagon, when the blood sugar levels fall. This causes the cells in the liver to turn glycogen back into glucose which can then be released into the blood. The blood sugar levels will then rise.

Now try a Test Bite- Higher tier.

Back to Responses to a changing environment index

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.