| A | B |
|---|
| nucleus | control center of the cell |
| fluid mosaic model | molcules are free to move sideways within the lipid bilayer |
| phospholipids | lipids with and attached phosphate group |
| eukaryote | cells with a true nucleus |
| cell theory | all organisms are made of cells |
| organelles | membrane-bound structures with particular functions within the cell |
| plasma membrane | flexible boundary between the cell and its environment |
| prokaryote | lack of membrane-bound organelles |
| transport protein | structures that allow molecules into the cell that do not normally pass the cell membrane |
| selective permeability | maintains homeostasis by allowing some things in and keeping some things out |
