| A | B |
|---|
| diffusion | process where molecules move from an area of higher concentration to an area of lower concentration |
| osmosis | diffusion of water molecules only |
| active transport | movement of materials through a cell membrane using energy |
| passive transport | movement of materials through a cell membrane without using energy |
| transport proteins | proteins in the cell membrane pick up molecules outside the cell and carry them in |
| engulfing | cell membrane surrounds a particle and forms a vacuole |
| selectively permeable | a property of cell membranes that allows some substances to pass through and others cannot |
| Photosynthesis | the process by wihch plants capture energy in sunlight and use it to make food |
| respiration | the process by which cells break down simple food molecules to release energy |
