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| the process that atoms and molecules move from a concentrated area to a less concentrated area. |
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| movement of materials across a membrane that requires an input of energy from a cell. |
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| the breaking down of sugars in plants or animals. |
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| Cellular levels of organization |
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Definition
| Atoms, molecules, organelles, cells, tissues, organs, organ system |
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| the movement of materials out of a cell by use of a vesicle. |
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| substances are transported across cell membranes by means of protein carrier molecules |
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| The cell is the basic unit of life and that cells come only from existing cells |
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| the diffusion of water across a semipermeable membrane |
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| Permeable to some molecules, but not to each other |
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Definition
| the movement of materials into a cell by use of a vesicle |
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