| A | B | 
|---|
| this structure helps with cell communication | carbohydrate chains | 
| larger molecules must pass through this | proteins channels | 
| small molecules like O2 or CO2 will pass | right through the phospholipid bilayer | 
| this structure improves the fluidity of cell membrane | cholesterol | 
| hydrophobic part of a phospholipid | "tails" | 
| because the cell membrane is made of many smaller structures, this term is used | Mosaic | 
| cell membranes will only allow specific molecules in or out | selectively permeable | 
| the phospholipids are doing this in a membrane | moving up/down, side to side | 
| correct model term for the cell membrane | Fluid Mosaic | 
| because the phospholipids move, the term ______ Mosaic is used | Fluid |