| A | B |
|---|
| Cell Membrane | surrounds all cells |
| Phospholipid | cell membranes are primarily made up of this molecule |
| Hydrophobic | inner region of cell membrane |
| Hydrophilic | region of cell membrane facing cytoplasm and watery environment outside |
| glycerol | head of phospholipid |
| fatty acid | tails of phospholipid |
| phospholipid bilayer | describes structure of all cell membranes |
| receptor protein | protein in cell membrane that recieves messages |
| transport protein | protein in the cell membrane involved in facilitated diffusion and active transport |
| semi-permeable | cell membranes only allow small molecules to enter passively |
| passive transport | transport of molecules from an area of high to low concentration into or out of a cell without the use of energy |
| diffusion | movement of carbon and oxygen |
| osmosis | diffusion of water |
| solute | sugar or salt in a solution |
| solvent | water in a solution |
| hypertonic solution | cell membrane shrinks in this type of solution |
| hypotonic solution | cell membrane expands in this type of solution |
| isotonic solution | cell membrane is not affected in this type of solution |
| facillitated diffusion | type of passive transport that requires the use of a transport protein |
| dynamic equilibrium | the result of passive transport |
| phagocytosis | white blood cells engulf bacteria |
| pinocytosis | cell membrane engulfs liquid into the cell |
| vessicle | small vacuole-like organelle involved in endocytosis and exocytosis |
| Active Transport | transport of molecules from an area of low to high concentration into or out of a cell using energy |
| endocytosis | type of active transport in which a cell membrane engulfs large food particles |
| exocytosis | type of active transport in which a vessicle attaches to cell membrane to release its contents |
