Now, the next aspect of the cell membrane that I'd like to discuss is a model known as the fluid mosaic model, which basically describes the way that our molecules down inside the cell membrane interact and move. So the question is, do our phospholipids and proteins remain stationary in place or are they in a constant fluidlike state of motion? So, to answer this question, we have to note the following important point. The bonds that basically hold the phospholipids together and the proteins together inside our cell membrane are intermolecular bonds. They're weak bonds, weak electric bonds. They're electric in nature.