Homeostasis and Transport Unit 4
Order by
12 terms
Terms | Definitions |
|---|---|
 phospholipid | a specialized lipid made of a phosphate "head" and two fatty acid tails. |
| phosphate head | is polar and is attracted to water |
| fatty acid tails | nonpolat and are repelled by water. |
| lipid bilayer | a double layered cell membrane, heads on the outside and tails inside, forms a barrier though which only small, nonpolar substances can pass. |
| Cell-Surface markers | Identify the cell type. Like a "nametag". |
| Receptor proteins | enable a cell to sense its surroundings by binding to certain substances outside the cell |
| enzymes | many proteins in the cell membrane that helps with important biochemical reactions inside the cell. |
| Transport Proteins | aid the movement of substances into and out of the cell that can't get through on their own. |
| eqilibrium | when a space is filled up with molecules evenly equilibrium is reached. |
| concentration gradient | substances that move from an area of high concentration to low concentration. |
| diffusion | the movement down the concentration gradient. |
| passive transport | the movement of substances across the cell membrane without the use of energy. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.