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10 Cards in this Set
- Front
- Back
eukaroyte
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any of the single-celled or multicellular organisms whose cells contain a distinct membranebound nucleus.
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prokaroyte
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any of the group of organisms primarily characterized by the lack of true nucleus membrane-bound cell compartments.
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selectively permeable
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a feature and a function of the plasma membrane that is essential to maintain homeostasis by regulating the passage of some substances while preventing others from entering the cell.
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diffusion
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a type of passive transport (spontaneous), therefore, is a net movement of molecules in and out of the cell across the cell membrane along a concentration gradient (higher concentration to lower concentration).
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facilitated diffusion
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when molecules move (diffuse) via special transport proteins found within the cell membrane.
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osmosis
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tendency of water to flow from a hypotonic solution (low concentration of dissolved substances) to hypertonic solution (higher concentration of dissolved substances) across a semipermeable membrane.
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isotonic
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having equal tension or pressure.
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hypertonic
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higer concentration
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hypotonic
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lower concentration
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