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. Androgen so let's begin with aldosterone. Now, we'll discuss aldosterone in much more detail when we'll discuss the structure and the function of our kidneys. So basically, aldosterone is a type of mineral, corticoid.