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Definition
| controls what enters and leaves the cell |
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Definition
| basic unit of structure and function of all living things |
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Definition
| when dissolved substances move from an area of higher concentration to an area of lower concentration |
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Definition
| diffusion of water through a cell membrane |
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Definition
| the movement of molecules across a membrane which requires ATP |
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Definition
| organism's regulation of its internal environment despite changes outside the body or cell |
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Definition
| the process by which a cell determines its specific function in a multicellular organism |
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| the series of changes an organism undergoes as it ages and grows |
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Definition
| two-layered arrangement of lipid molecules found in the cell membrane |
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Definition
| structural model of plasma membrane where molecules are free to move sideways within the lipid bilayer |
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Definition
| proteins in the membrane that regulate what goes in to and out of the cell |
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Definition
| a lipid found in the cell membrane giving it flexibility |
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Definition
| when a molecule is broken down in a liquid until you can't see it and it becomes a part of the solution |
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Definition
| a measure of how much of a substance is mixed in with another substance |
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Definition
| a material that allows some molecules through but not others |
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Definition
| process by which intracellular chemicals are released into secretory vesicles |
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Definition
| the uptake of extracellular materials into the cell in vesicles |
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