Negative Feedback Control

• High Blood Glucose level

  • If the blood glucose concentration rises to above normal levels e.g.

  after a meal, it is detected by receptors in the pancreas.

  • These cells release more INSULIN.

  • The insulin is then transported to the liver where it is picked up by

  insulin receptors.

  • Excess glucose is then absorbed by the liver and an enzyme is released to catalyse the reaction changing glucose to glycogen.
• • Glucose is stored in the liver as glycogen.

  • This process brings about a drop in the blood glucose level.
• Low Blood Glucose level

  • If the glucose level drops below the normal level different receptor cells in the pancreas detect this and release more GLUCAGON.

  • This hormone is then transported to the liver and it triggers a different enzyme which catalyses the reaction changing glycogen to glucose.
• • Now glucose is released from the liver and the glucose levels rise to normal levels once again.