Does the cell membrane break down sugar to release energy that an animal cell can use

no

Explanation:

the function of cell membrane is to act as a barrier between the cell's content and the outside of the cell

Glucose enters the cells and is transported to the mitochondria. Once in the mitochondria, the glucose is used as a product of cellular respiration. Cellular respiration is when glucose and oxygen are used to make water, carbon dioxide and a usable form of energy known as ATP (which stands for adenosine triphosphate).