Cell membranes
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Created by:
MerseyMorales on October 23, 2011
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Description:
Words to know for Pre AP Biology test, Monday 24th
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18 terms
Terms | Definitions |
|---|---|
 membrane | Made of two things: fats and lipids. |
| phospholipids | Special kind of lipid |
| hydrophillic | Attracted to water |
| hydrophobic | Repelled by water |
| semipermeable membrane | Controls what gets in or out |
| concentration gradient | Difference in concentration |
| diffusion | Moves from HIGH TO LOW concentration THROUGH A MEMBRANE. Passive transport: no energy needed |
| osmosis | Diffusion of water |
| facilated | Move from high to low concentration THROUGH A CHANNEL |
| passive transport | No energy needed |
| simple diffusion | Directly through the membrane |
| endocytosis | Cell takes IN materials |
| exocytosis | Expulsion of materials |
| phagocytosis | Cell eating endocytosis of solids |
| pinocytosis | Cell drinking of endocytosis liquids |
| hypotonic | A cell in freshwater. High concentration of water around cell. Cell gains water |
| hypertonic | A cell in saltwater. Low concentration of water around cell |
| isotonic | No difference in concentration of water between cell and environment cell in equilibrium. I so happy! (; |
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