| A | B |
|---|
| mosaic | a mosaic of proteins is embedded and dispearsed in the phospholipid |
| peripheral proteins | proteins that are not embedded in the lipid bilayer of the membreane and they are appendages loosely bound to surface o the membrane |
| integral proteins | generally transmembrane proteins with hydrophobic regions that completely span the hydrophobic interior of the membrane |
| transport protein | penetrates the membrane and provides a hydrophillic channel across the membrane that is selective for a particular solute |
| enzyme protein | built into membrane, their active site exposed to the substances in the adjacent solution |
| signal transduction | this intregral protein may have a building site with a specific shape that fits the shape of a chem messenger |
| intercellular joining | integral membrane proteins of adjacent cells may be hooked together |
| cell to cell recognition | some glycoproteins serve as identification tags that are specifically recognized by the other cells |
| solute | a substance that is dissolved in a solution |
| solvent | the dissolving agent of a solution |
| solution | liquid mixture of two or more substances |
| diffusion | movement of particles from high to low concentration |
| tonicity | refers to the relative concentration of solutes in 2 fluids |
| hypertonic | contains more solutes |
| hypotonic | contains lless solutes |
| isotonic | equal solute on each side |
| facilitated diffusion | when ions and polar molecules diffuse through the cell membrane |
| water potential | amonut of solute plus amount of pressure |
| water high potential | solute low |
| low water potential | solute high |
