Question

Regulation of blood glucose level; role of insulin and glucagon

Answer 1

Insulin helps in controlling the blood glucose levels by signaling the liver and muscle and fat cells to take glucose from the blood. It helps cells to take in glucose that can be used as energy. If the body has sufficient energy, insulin signals the liver to take the glucose and store it as glycogen.
The role of glucagon in the body is to prevent blood glucose levels from dropping too low. To do this, it acts on the liver in several ways: by stimulating  the conversion of stored glycogen back to glucose, which can be released into the bloodstream. This cycle is called glycogenolysis.