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Diffusion, Osmosis, and Water Potential
Biology LAB
18
Biology
Undergraduate 1
09/27/2013

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Term
Liter (L)
Definition
Basic unit of volume in the metric system. Equal to 1000mL
Term
Milliliter (mL)
Definition
1/1000 liter
Term
Microliter
Definition
1/1,000,000 liter
Term
Gram
Definition
Base unit of mass in the metric system
Term
Dialysis
Definition
Movement of solutes across a selectively permeable membrane.
Term
Difussion
Definition
Passive random movement of molecules from an area of high concentration to low cocentration
Term
Hypertonic
Definition
In comparing two solutions, referring to the one with a greater solute concentration
Term
Hypotonic
Definition
In comparing two solutions, referring to the one with a lower solute concentration
Term
Isotonic
Definition
Solutions having equal solute concentrations
Term
Lysis
Definition
To break open
Term
Osmosis
Definition
Diffusion of water across a selectively permeable membrane
Term
Solution*
Definition
Mixture of substances having uniform composition
Term
Solute*
Definition
Substance dissolved in a solvent; component of a solution in a lesser amount
Term
Solvent*
Definition
The dissolving medium of a solution; component of a solution present in the greater amount
Term
Transpiration
Definition
Process by which water is lost in plants; usually occurs through the leaves
Term
Turgid
Definition
Description of a walled cell that has a greater solute concentration than its external environment, resulting in an influx of water
Term
Turgor Pressure
Definition
Force directed against the cell wall after an influx of water and the swelling of a walled cell due to osmosis
Term
Water Potential
Definition
The force which determines the direction in which water will flow, governed by solute concentration and applied pressure
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