Geographic Concepts. The Census Bureauâs urban-rural classification is fundamentally a delineation of geographical areas, identifying both individual urban areas and the rural areas of the nation.
Glycogen is a polysaccharide molecule stored in animal cells along with water and used as a source of energy. When broken down in the body, it is transformed into glucose, an important source of energy for animals. In animals, it plays a role similar to that played by starch in plants.
Glycogen is a form of carbohydrate, particularly a form of polysaccharide, while glucagon is a hormone. It is a form of peptide from the family of secretin, another hormone. What are the roles of these two substances in the body? Well, glycogen is a form of storage for glucose in humans and animals.