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13 Cards in this Set
- Front
- Back
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Cellular membranes are fluid mosaics of lipids and proteins |
Fluid Mosaic Model |
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Diffusion of a substance across a membrane with no energy investment |
Passive transport |
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The movement of particles of any substance to that they spread out into the available space |
Diffusion |
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The concentration gradient itself represents _________ energy |
potential energy |
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The diffusion of free water across a selectiveley permeable membrane, whether artificial or cellular |
Osmosis |
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To explain the behavior of a cell in a solution, we must consider two things |
-solute concentration -membrane permeability |
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The ability of a surrounding solution to cause a cell to gain or lose water |
Tonicity |
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Depends in part on its concentration of solutes that cannot cross the membrane |
Tonicity |
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Solutes that cannot cross the membrane |
Tonicity |
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Same concentration (intracellular and extracellular) |
Isotonic |
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(extracellular) more concentrated |
Hypertonic |
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(extracellular) less concentrated |
Hypotonic |
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Passive transport aided by proteins |
Facilitated diffusion |
