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14 Cards in this Set
- Front
- Back
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Passive Transport
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The movement of substances across the membrane.
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Diffusion
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The movement of molecules from an area of higher concentration to an area of lower concentration
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Concentration Gradient
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The difference in the concentration of molecules across a space.
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Equilibrium
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When the concentration of the molecules of a substance is the same throughout a space.
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Hypotonic
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Describing a solution whose solute concentration is lower than that inside a cell.
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Hypertonic
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Describing a solution whose solute concentration is higher than that inside a cell.
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Isotonic
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Describing a solution whose solute concentration equals that inside a cell.
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Contractile Vacuole
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An organelle in protists that expels water.
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Turgor Pressure
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Water pressure within a plant cell.
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Plasmoysis
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The shrinking or wilting of a walled cell in a hypertonic environment.
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Cytolysis
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The bursting of a cell.
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Facilitated Diffusion
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A process in which substances move down their concentration gradient across the cell membrane with the assistance of carrier proteins.
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Carrier Proteins
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A protein that transports specific substances across a biological membrane.
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Ion Channels
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A membrane protein that membrane through which an ion can diffuse.
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