1. CELL TRANSPORT
Cell membrane is semipermeable- allows certain things in, keeps certain things out
Some molecules can pass right through small spaces in membrane= DIFFUSION- high concentration to low concentration
Achieves equilibrium

2. OSMOSIS Diffusion of water across membrane= osmosis
Cells must maintain certain concentration of water- water in cell creates osmotic pressure
Concentration of molecules (salts, sugars, ions) outside of cell usually = to inside
Thus- water moves in at the same rate it moves out

3. Osmotic Environments
Isotonic
Hypotonic
Hypertonic

4. OSMOSIS Isotonic- ISO- same
Concentration of solutes is = in and out of cell
Cell maintains regular shape

5. OSMOSIS Good for plant cells- creates turgor pressure
If concentration of solutes in the cell is greater than outside, then the outside is HYPOTONIC to the cell
Cell will swell as water rushes in
Think 1.) Hypo- under, or low (solution has lower amount of particles)
2.) HypOtonic
Good for plant cells- creates turgor pressure

6. OSMOSIS
If concentration of solutes in the cell is less than outside, then the outside solution is HYPERTONIC to the cell
Cell will shrink because water rushes out
Think- HYPER= greater (solution has greater amount of particles)
Bad for plant cells- cells become PLASMOLYZED

7. OSMOSIS
Water always travels from the hypotonic area to the hypertonic area
Hypo  Hyper
H2O