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10 Cards in this Set
- Front
- Back
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Diffusion of water across a selectively permeable membrane in response to solute concentration gradients
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Osmosis
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Movement of solutes that does not require energy from ATP
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Passive transport
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Property of allowing some substances but not others to cross a plasma membrane
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Selective permeability
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Solutes are made to cross plasma membranes against their own concentration gradients; requires ATP
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Active transport
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Net movement of like molecules or ions from an area of high concentration
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Diffusion
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Refers to the relative solute concentrations in two fields
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Tonicity
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Solutes diffuse across a plasma membrane through a transport protein down their own concentration gradients
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Facilitated diffusion
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Difference in the number of molecules or ions of a given substance in two neighboring regions
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Concentration gradient
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A cell is placed in a solution of sugar dissolved in water. What is the solute?
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Sugar
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A cell is placed in a solution of salt dissolved in water. What is the solvent?
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Water
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