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. animals store excess sugar as glycogen. energy from glycogen can be used for muscle contraction. glycogen can be broken down to release glucose and increase blood sugar. glycogen provides structural support for cell walls.

Explanation:

The text states that animals store excess sugar as glycogen, glycogen - derived energy is used for muscle contraction, and it is broken down to release glucose and increase blood sugar. Glycogen is not for providing structural support for cell walls (cellulose does that in plants and not glycogen).

Answer:

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