3.3 transport molecules in cells
osmosis -- H2O
diffusion
| isotonic (same as outside) | hypertonic (higher than outside) | hypotonic (lower than outside) |
|---|---|---|
| 97% H2O outside 97% | in 97% H2O outside 95% | inside 97% H2O outside 100% |
| 3% NaCl outside 3% | in 3% NaCl outside 5% | inside 3% NaCl outside 0% |
| most common in nature | use diffusion to reach equilibrium | doesn’t happen a lot in nature |
| nothing needs to move | water moves out because solute cant move through | water moves inside |
| 97% water 3% salt | equilibrium of 96% water 4% salt | 98.5% water 1.5% salt |
| stays the same. healthy | shrivels up cell. kills it. food preservation. mummification | cell expands. can pop. death of the cell |
dynamic equilibrium -- spread out and evenly fill