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12 Cards in this Set
- Front
- Back
homeostasis
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biological balance...
-occurs within each cell -occurs at levels of biological organization |
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transport
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carrying things across the cell membrane...
-absorption of nutrients -excretion of waste |
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what are the kinds of transport?
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-passive (needs no cell energy)
-active (needs cell energy) |
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diffusion
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movement of materials because they want to balance from an area of GREATER concentration TO LESSER concentration
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concentration gradient
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difference in the concentration of a substance across a space.
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passive transport
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movement of materials across the cell membrane without cell energy-using the energy of the moving materials.
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osmosis
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diffusion of water across the cell membrane (water only)
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hypotonic solution
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solution surrounding the cell having a GREATER concentration than inside the cell.
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cytolysis
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bursting of a cell
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turgor pressure
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pressure of water against the cell wall and cell membrane of a plant cell.q
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hypertonic solution
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solution surrounding the cell having a LOWER water concentration than inside.
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plasmolysis
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shrinkage of a cell due to water loss.
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