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Definition
| the movement of a substance across a cell membrane against (up) an concentration gradient: requires cell to expend energy |
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| a protien that transports specific substances across a biological membrane |
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Definition
| the differance in concentration of a substance across space |
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| an organelle in protiest that expels water |
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| the process in which molecul move from areas of higher concentration to areas of lower concentration |
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| the process by which a cell surrounds and engulfs substances |
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| a state that exists when the concentrationof a substance is the same trough out a space |
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| a process in which a vesicle inside a cell fuses with the cell membrane and releases its contents to the extrnal environment |
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Definition
| a process in which substances move down thier concentratioj gradients across the cell membrane with the help of carier proteins |
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| describing a solution whoses solute concentration is higher then that inside a cell |
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| describing a soulution whose solute concentration is lower then that inside a cell |
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| a membrane protien that provides a passageway across the cell membrane through which an ion can diffuse |
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Definition
| describing a solution whose solute concentration equals that inside a cell |
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Definition
| the difusion of water across a cell memvrane |
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Definition
| the movement of substances across a cell membrane with (down) their concentration gradient : with out the use of cell energy |
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Definition
| a cell that engulfs in phagocytosis |
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| a type of endocytosis in which a cell engulfs large particlesor whole particles |
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Definition
| the shrinking or wilting of a walled cell in hypertonic fluids |
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Definition
| a type of endocytosis in which a cell engulfs solutes or fluids |
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| a carrier protien that activly trnsprots K+ ions into and Na+ ions out of cells |
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Definition
| water pressure within a plant cell |
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| a membrane bound sac in a eukaryotic cell that contians material involved in endocytosis, exocytosis, or transport with in a cell |
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