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13 Cards in this Set
- Front
- Back
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Bilayer |
two layers of molecules composed of phospholipid molecules |
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Hydrophillic |
attracted to water |
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Hydrophobic |
not attracted to water |
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Integral Proteins |
span completely across the phospholipid bilayer |
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Peripheral Proteins |
loosely attached to one side of the bilayer |
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Semi permeable |
allow some, but not all substances to pass through |
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Diffusion |
movement of things from a more concentrated area to a less concentrated area |
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Osmosis |
diffusion of water across a semi-permeable membrane |
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Facilitated Diffusion |
substances that are too large, or have a charge, can't pass through the cell membrane- they use integral proteins to get through the membrane |
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Carrier Proteins |
carry non-charged molecules across the cell membrane molecule must have correct shape in order to bind to the carrier |
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Channel Proteins |
have a tunnel-like shape that allows charged particles to pass though the membrane |
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Passive Transport |
when substances travel along their concentration gradient, no input of cellular energy is required (ex. diffusion, osmosis, facilitated diffusion) |
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Active Transport |
movement of substances against their concentration gradient (accomplished by pumps) |
