chapter 3: movement in and out of cells
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8 Terms
diffusion
the net movement of particles from a region of their higher concentration to a region of their lower concentration
osmosis
the diffusion of water from high water potential to low water potential through a partially permeable membrane
turgid
a description of a plant cell that is tight and firm
turgor pressure
the pressure of the water pushing outward on a plant cell wall
flaccid
a plant cell that is soft
plasmolyzed
a description of a cell in which the cell membrane tears away from the cell wall
active transport
the movement of molecules or ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration
carrier proteins
protein molecules in cell membranes that can use energy to change shape and move ions or molecules into or out of a cell