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11 Cards in this Set
- Front
- Back
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What is the difference between permeable, impermeable, and selectively permeable? |
nothing can pass through, everything can pass through, only certain molecules are allowed to pass through |
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Definition of Diffusion? |
Movement of molecules from an area of high concentration ([ ]) to an area of lower concentration |
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What are some factors that affect diffusion? |
Electrical gradient (nerve fiber), Are carriers involved? (Faster with carriers) Energy in the system – how fast are the particles moving? |
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Definition of Osmosis? |
Net movement of H2O molecules from an area of high [ ] to an area of low [ ] through a selectively permeable membrane. |
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What is Osmotic Pressure? |
a force that drives (“sucks”) water from where it’s more concentrated to where it’s less concentrated |
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Why does salt "suck"? |
Salt is a solute, when it is concentrated inside or outside the cell, it will draw the water in its direction. |
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What does it mean when a solution is isotonic? |
concentration ([ ]) of H2O is the same both inside and outside of the cell or [ ] of solute is the same inside of the cell as in the solution |
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What does it mean when a solution is hypertonic? |
the concentration of the solute is greater in the solution (net movement of H2O from the cell into the solution) |
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What are animal/plant cells called when they get too hypertonic? |
Animal-Crenated, Plant-Plasmolysis |
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What does it mean when a solution is hypotonic? |
the concentration of solute is lower in the solution than in the cell (net movement of H2O into cell) |
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What are animal/plant cells called when they get too hypotonic? |
Animal-Lysis, Plant-Turgor |
