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11 Cards in this Set
- Front
- Back
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Define Osmosis. |
The diffusion of water from an area of higher water potential to an area of lower water potential. |
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What is water potential? |
The likelihood of water molecules to diffuse out of or into a solution. |
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Can large solute molecules diffuse through easily? |
No, but water can. |
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What water potential does pure water have? |
0. |
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How does adding a solute to water affect the water potential? |
Lowers the water potential, it is always negative. |
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What does a more negative water potential mean? |
It has a stronger concentration of solutes in the water. |
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What does isotonic mean? |
A solution with the same concentration as another. There is no net movement. |
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What is a hypotonic solution? |
A solution with higher potential than the cell. |
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What is a hypertonic solution? |
A solution with lower water potential than inside the cell. |
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Name 3 factors which affect osmosis. |
Water potential gradient - higher = faster rate. Thickness of exchange surface - thinner = faster. Surface area - larger SA = faster rate. |
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Is osmosis active or passive? |
Passive. |
