| Term | Definition |
| carrier protein | combine with a substance to help it move across the membrane |
| channel protein | a substance can simply move across the protein |
| receptor protein | a shape that allows a specific molecule to bind to it. |
| fluid-mosaic model | model for the plasma membrane based on the changing location and pattern of protein molecules in a fluis phospholipid bilayer |
| glycolipids | carbohydrates covalently bonded to lipids |
| glycoproteins | proteins that have carbohydrates covalently bonded to them |
| phospholipids | forms the bi-layer of the cell membrane. has a polar hydrophillic head bonded by two hyrdophobic tails |
| selectively permeable | beacuse living membranes can choose what materials can pass through it is said to be this |