What can the small food molecules that diffuse into our body cells during diffusion be used for?

Glucose can be used by body cells during the process of aerobic respiration in order to make energy The liver will build up any extra glucose into the compound glycogen to be stored until it is needed. The amino acids will be used by the body to make proteins. The fatty acids and glycerol area transported to and diffuse into cells and are used as energy sources and any extra is stored under the skin or around organs as fatty tissue.