This morning we continued our preparations for the assessment on Thursday. Bobby has completed his index cards which will serve as one of his primary study tools. We completed our review of all of the 13 cell organelles as well as several important functions that take place within the cell. These include diffusion, osmosis, equilibrium and homeostasis. One of the topics that will be covered on Thursday's assessment will be the cell membrane. Bobby will need to know that this organelle is semi permeable, consists of two layers of lipids and sandwiches the carrier proteins between the two layers.