| Term | Definition |
|---|
| diffusion | movement of stuff from a high concentration to a low concentration |
| osmosis | diffusion of water; water moving from a high concentration to a low concentration |
| cell membrance | a selectively permeable layer that controls what enters and leaves the cell |
| selectively permeable | picky about what it allows through |
| phospholipid | makes up the cell membrane, composed of a polar head and a non-polar tail |
| passive transport | movement of materials that does NOT require energy |
| Why do cells transport materials | to maintain homeostasis |
| homeostasis | constant internal conditions |
| facilitated diffusion | movement from high to low concentration using channel proteins |
| Water moves... | to where there is more stuff |
| Label amount of stuff | surrounding the cell, compared to stuff in the cell |
| isotonic | same amount of stuff around cell as in the cell |
| hypertonic | more stuff around the cell than in the cell |
| hypotonic | less stuff around the cell than in the cell |
| istonic solution | causes the cell to stay the same size |
| hypotonic solution | causes the cell to swell |
| hypertonic solution | causes the cell to shrink |
| active transport | movement of materials that does require energy |
| active transport | moving against the concentration gradient from low concentration to high concentration |
| active transport | uses carrier proteins |
| passive transport | uses channel proteins |
| equilibrium | balanced, same amount of stuff on both sides |
Combine with other sets
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