One type of metabolic feedback loop that influences weight control involves the regulation of glucose levels in the blood. Which organ in the digestive system participates in this regulation by breaking down glycogen

Liver

Explanation:

1. Glucagon: it control the glucose levels in the blood.

2. Glucagon is produced by the alpha cells, in the pancreas.

3. It prevent dropping of blood glucose levels too low. so, it acts on the liver in many ways:

4. It stimulates the breakdown of glycogen which is stored in the liver into glucose, which finally released into the bloodstream, this process is known as glycogenolysis.

5. It also stimulates the production of glucose from amino acid molecules and some other non carbohydrate pre-cursors, by the process known as gluconeogenesis.