| A | B |
|---|
| Diffusion | the movement of ANY MATERIAL across a membrane |
| Osmosis | the movemement of WATER across a membrane |
| Concentration Gradient | the unequal distribution of particles (molecules) that controls osmosis |
| isotonic | equal concentration inside and outside the cell |
| hypotonic | (not enough) there is more concentration outside the cell than inside causing water to flow IN to the cell |
| hypertonic | (too much) there is more concentration inside the cell is higher than on outside causing water to flow OUT of the cell |
| active transport | REQUIRES ENERGY to move materials across a membrane (the flow is high to low) |
| passive transport | needs NO energy to move materials across a membrane (the flow is high to low) |
| endocytosis | the engulfing of cell waste and breaking off of the section to prepare it to be movedout of the cell |
| exocytosis | the expulsion or GETTING RID OF cell wastes |
