| A | B |
|---|
| phospholipids | Plasma membrane is made of a double layer of: |
| tewrm that means attracts water | hydrophilic |
| term that means excludes water | hydrophobic |
| isotonic solutions | The 2 solutions have the SAME solute concentration |
| If a solution has a greater solute concentration than another it is: | hypertonic |
| hypotonic | If a solution has a lower solute concentration than another it is: |
| marker proteins | identify the cell |
| channel proteins | pores in the membrane that let substances pass through |
| 3 types of membrane proteins | 1. Channel 2. Marker 3. Receptor |
| crenation | shrinkage of a cell due to water loss |
| random movement of molecules | diffusion |
| Example of a molecule that enters a cell via facilitated diffusion | Glucose |
| diffusion of water through a selectively permeable membrane | Osmosis |
| Filtration | Movement of substances across a membrane due to a pressure gradient |
| The cell uses ATP to pump solutes up a concentration gradient | Active Transport |
| Single-celled fresh water organisms have this to pump out excess water | Contractile Vacuole |
