Dear student,In liver , Glucose is converted into glycogen by the process of Glycogenesis . Hence , glucose is stored in the form of glycogen . This glycogen can be converted to glucose-1-phosphate and glucose by the process of glycogenolysis , when required . When blood glucose level is low , Glucagon promotes glycogenolysis in liver , and tends to increase the blood glucose level . When blood glucose level is high , Insulin promotes glycogenesis in liver and tends to decrease the blood glucose level