Question

glycogen plays an important role in regulating blood sugar. when glucose levels in blood are low, glycogen is broken down by the body to provide glucose. in the muscles, glycogen is also broken down to release energy to help with muscle contraction. what are the functions of glycogen? select all that apply. glycogen can be broken down to release glucose and increase blood sugar. animals store excess sugar as glycogen. energy from glycogen can be used for muscle contraction. glycogen provides structural support for cell walls.

Explanation:

Glycogen is a storage form of glucose in animals. When blood - glucose levels are low, it is broken down to release glucose, thus increasing blood sugar. It also stores excess sugar in animals. In muscles, energy from glycogen breakdown is used for muscle contraction. Glycogen is not involved in providing structural support for cell walls as that is the function of substances like cellulose in plants.

Answer:

Glycogen can be broken down to release glucose and increase blood sugar.
Animals store excess sugar as glycogen.
Energy from glycogen can be used for muscle contraction.