Now, Corticosteroids simply means they are derived from steroids, specifically from cholesterol, and that makes them lipid soluble. So that means all of these hormones are basically not water soluble. So that means they do need carriers, protein carriers, to transport them inside the blood plasma. And they basically can easily cross the cell membrane of the target cell because the cell membrane is lipid soluble, as are these hormones. So we have several different groups of hormones that we have to be familiar with. We have aldosterone, we have Cortisol and Cortisone and also our.