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17 Cards in this Set
- Front
- Back
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What is osmosis |
It is the net movement of water molecules from a region of high WP to a region of low WP down a water potential gradient across a partially permeable membrane |
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The cell surface membrane and the membrane around the vacoule in a plant cell are p______________ |
Partially permeable |
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Water can pass through the partially permeable membrane but solutes like ___________ are too big |
Sugar |
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A solution with less water and more solutes is said to be____________ and has a l__________ WP |
Concentrated Lower |
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A solution with more water and less solutes is said to be d_______ and has a h_________ WP |
Dilute Higher |
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Where does osmosis take place across |
A partially permeable membrane |
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If the solutions on either side have different WPs there will be a____________ |
Water potential gradient |
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Water moves from where there is m_________ to where there is l________ |
More Less |
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What will happen if you put RBC in a dilute concentration |
The cytoplasm of the RBC is more concentrated so water will move into the cytoplasm by osmosis and push against the cell membrane causing it to burst |
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What happens if you put RBC in a concentrated solution |
The cytoplasm will have more water and the water will move out of the cytoplasm by osmosis. The cytoplasm shrinks and it becomes shriveled |
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What happens if you put a plant cell in a dilute solution |
The cytoplasm and vacoule are more concentrated and have less water. Water will move into the plant cell across the partially permeable membrane and it will become turgid. The cytoplasm pushes against the membrane and cell wall |
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What happens when a cell is turgid |
It counteracts the pressure and no more water can enter the cell |
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When a cell is turgid this gives the plant ___________ |
Support |
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What happens if you place a plant cell in a concentrated solution |
The cytoplasm and vacoule are less concentrated and water will move out of the cell through the partially permeable membrane by osmosis from a region of high WP to one of Low WP and the cytoplasm shrinks |
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When a plant cell shrinks it becomes_______ |
Flaccid |
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When the cytoplasm detaches from the membrane the cell is said to be |
Plasmolysed |
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When a plant cell is flaccid it has no s__________ and it w________ |
support wilts |
