Final answer:
The liver regulates blood glucose levels by responding to the hormones insulin and glucagon. Insulin promotes the uptake of glucose, while glucagon triggers the breakdown of glycogen.
Step-by-step explanation:
When the blood glucose level is too high, the pancreas secretes insulin, which promotes the uptake of glucose by the liver, fat, and muscle cells. Insulin also inhibits the production of glucose by the liver. On the other hand, when the blood glucose level is too low, the pancreas secretes glucagon, which triggers the breakdown of glycogen in the liver, releasing glucose into the bloodstream.