Final answer:
The liver converting glucose into glycogen, with water released as a byproduct, is known as glycogenesis, which is a synthesis reaction.
Step-by-step explanation:
The process of the liver converting glucose into glycogen is known as glycogenesis. This reaction involves combining smaller glucose molecules into a larger glycogen molecule, which is a way for the body to store excess glucose. Water is typically released as a byproduct during the formation of the glycosidic bonds that link glucose units together in glycogen. Glycogenesis is a synthesis reaction because it forms a complex molecule from simpler ones. Conversely, when the body needs to release glucose for energy, the liver breaks down glycogen in a process called glycogenolysis. Additionally, the liver can generate glucose from non-carbohydrate sources through gluconeogenesis.