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								The process of maintaining balane inside a cell									 
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								Homeostasis									 
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								A boundary between a cell and its environment									 
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								Plasma membrane									 
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								The feature of the plasma membrane that keeps some substances out									 
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								Selective permeability									 
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								Separeates prokaryotic and eukaryotic cells from the watery environment in which they exist									 
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								Plasma membrane									 
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								The quality of a plasma membrane that allows oxygen and glucose to move in									 
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								Selective permeability									 
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								Maintained by the plasma membrane									 
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								Homeostasis									 
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