| A | B |
|---|
| These have hydrophobic tails and polar heads! | phospholipids |
| Cell membranes are called this because of embedded proteins | mosaic |
| If a cell has the same concentration inside and outside it is in this type of solution | isotonic |
| Diffusion of water | osmosis |
| proteins that allow the passage of molecules or ions | transmembrane channels |
| If ions pass through special channels designed for them | facilitated diffusion |
| This special protein channel allows the passage of H+ ions to make ATP | proton pump |
| If energy is required to move a material through a membrane | active transport |
| This protein channel uses a cotransport of glucose | sodium-potassium pump |
| These act as cell surface markers | Glycolipids |
| Cystic fibrosis results from these defective channels | chloride (Cl-) |
| the ability of a membrane to be picky about what goes in and out | selective permeability |
| If there is more water on the outside of a cell than inside, this happens | lysis of cell |
| if there is less water outside the cell than inside the cell, this happens | plasmolysis |
| this cell is 100 times more permeable to water than the Amoeba | red blood cells |
| these cells would show turgor pressure within their vacuoles | Elodea cells |
| Paramecium use this to get rid of excess water inside themselves | contractile vacuole |
| If the concentration of solute particles is lower outside of a cell than inside, we say that the cell contents are this | hypertonic |
| Because phospholipid molecules are free to move, the cell membrane is called this | fluid |
| cell membranes are freely permeable to this | water |
| Cell membranes are held together by this | hydrophobicity to water |
| When a cell engulfs large objects such as bacteria | phagocytosis |
| when an ion moves from an area of high to low concentration across a membrane | "moving down a concentration gradient" |
| the cell can take advantage of this to move particles across a membrane | free energy gradient (high concentration on one side of the membrane) |
| "Sugar" coating on the outside of a cell | glycocalyx |
| makes cell membranes "stiff" and able to withstand high temperatures | choelsterol and saturated fatty acids |
| makes a cell membrane more "fluid" | unsaturated fatty acids |
| solute | substance dissolved within a solvent (like water) |
