| A | B |
| diffusion | movement from an area of high concentration to an area of lower concentration |
| osmosis | the movement of water to balance a concentration difference |
| facilitated diffusion | diffusion requiring channels |
| active transport | movement of molecules requiring a pump |
| active transport | movement of molecules that requires expending energy |
| endocytosis | bringing a large object into the cell |
| exocytosis | exporting a membrane-bound object from the cell |
| phagocytosis | another name for endocytosis |
| diffusion | means by which oxygen enters a cell |
| facilitated diffusion | means by which glucose enters a cell |
| phospholipid bilayer | the structure of the cell membrane |
| protein channel | membrane protein that allows relatively large particles to pass through a membrane |
| selectively permeable | phrase referring to membrane property of allowing some things to pass but not others |
| receptor | membrane structure that transmits information into the cell |
| protein marker | membrane structure that serves to identify the cell |
| passive transport | diffusion and facilitated diffusion are examples |