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16 Cards in this Set
- Front
- Back
Imbibition |
The phenomenon by which the living or dead plant cells absorb water by surface attraction. |
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Diffusion |
The free movement of molecules of a substance from the region of higher concentration to the region of lower concentration when the two are in direct contact. |
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Osmosis |
The movement of water molecules from their region of higher concentration to the region of their lower concentration through a semi permeable membrane. |
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Endomosis |
The inward diffusion of water through a semi permeable membrane when the surrounding solution is less concentrated .This tends to swell up the cell. |
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Exomosis |
The outward diffusion of water through a semi permeable membrane when the surrounding solution is more concentrated.This tends to shrink the cell. |
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Osmotic Pressure |
Osmotic Pressure of a solution is its tendency to take in water by osmosis. |
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Tonocity |
The relative concentration of a solution that determines the direction and extent of diffusion. |
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Isotonic |
The relative concentration of water molecules on either side of the cell membrane is same. |
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Hypotonic |
The solution outside the cell has a lower concentration than the fluids inside the cell. |
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Hypertonic |
The solution outside the cell has a higher concentration than the fluids inside the cell. |
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Active Transport |
The passage of a substance from its lower to higher concentration through a living cell membrane using energy from the cell |
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Turgidity |
A condition in which the cell cannot accommodate any more water. |
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Turgor Pressure |
The pressure of the cell contents on the cell wall. |
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Plasmolsis |
The contraction of cytoplasm from the cell wall caused due to the withdrawal of water when placed in a strong hipertonic solution. |
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Flaccidity |
The condition in which the cell content is shrunken and the cell is no more tight. |
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Guttation |
Loss of excessive water. |