| Term | Definition |
|---|
| active transport | movement against a concentration gradient requiring the use of energy of a cell |
| carrier protein | transport protein that carries a specific substance across a cell membrane |
| concentration gradient | a difference in the concentration of a substance across space |
| diffusion | random movement of particles from an area of high concentration to an area of lower concentration |
| endocytosis | movement of a substance by vescile to the incide of a cell |
| equilibrium | state in which the concentration of a substance is equal throughout space |
| exocytosis | movement of a substance by vescile to the outside of a cell |
| facilitated diffusion | transport of substances through a cell membrane down a concentration gradient aided by carrier proteins |
| hypertonic solution | a solution that causes a cell to shrink because of osmosis |
| hypotonic solution | a solution that causes a cell to swell because of osmosis |
| ion channel | transport protein in a cell membrane through which ions can pass |
| isotonic solution | a solution that causes no change in cell size |
| osmosis | movement of water through a selectivly permeable membrane from an area of high concentration to an area of lower concentration |
| passive transport | movement of a substance without the use of energy from the cell |
| receptor proteins | protein that binds to a specific signal molecule, causing the cell to respond |
| second messenger | signal molecule produced in response to the binding of a chemical signal; alters the chemical activity within the cell |
| sodium-potassium pump | carrier protein that transports sodium ions out of a cell and potassium ions into the cell |
Combine with other sets
Share on Facebook
Share on MySpace