| A | B |
|---|
| cell | Basic unit of all living things |
| cell theory | summarizes discoveries about the cell |
| nucleus | control center of the cell |
| eukaryotic | cell with a nucleus and organelles |
| prokaryotic | smaller cell with no nucleus or organelles |
| lipid bilayer | has a hydrophilic head and hydrophilic tail, give the cell shape and structure |
| concentration | mass of the solute in a given volume of solvent |
| diffusion | movement of molecules from an area of high concentration to an area of low concnetration |
| equilibrium | when the concentration of the solute is the same throughout the solution |
| osmosis | diffusion of water through a selectively permeable membrane |
| isotonic | concnetration of solute is the same inside and outside the cell |
| hypotonic | there is more inside the cell so water moves out |
| hypertonic | there is more outside the cell so water moves in |
| facilitated diffusion | larger molecules get "help" crossing the membrane, use protein channels |
| active transport | moving materials against the concnetration gradient, requires energy |
| endocytosis | taking materials into the cell by forming a pocket of the cell membrane |
| pinocytosis | cells take up liquid from surrounding environment by forming pockets of cell membrane |
| exocytosis | forcing materails out of the cell by forming a pocket of cell membrane |
