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Bio Terms 5.1

TermDefinition
Passive Transport -The movement of substances across a cell membrane without the use of energy by the cell.
Diffusion -The movement of partials from regions of higher density to regions of lower density.
Concentration Gradient -A difference in the concentration of a substance across a distance.
Equilibrium -When the concentration of a substance is the same throughout a space.
Osmosis -The diffusion of water or another solvent from a more dilute solution(of the solute) to a more concentrated solution.
Hypotonic -A solution whose solute concentration is lower than the solute concentration inside the cell.
Hypertonic -A solution whose solute is higher than the solute concentration inside the cell.
Isotonic -A solution whose solute concentration is equal to the solute concentration inside the cell.
Contractile Vacuole -An organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
Turgor Pressure -The pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
Plasmolysis -The contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis.
Cytolysis -The bursting of a cell.
Facilitated Diffusion -The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
Carrier Protein -A protein that transports substances across a cell membrane.
Ion Channel -A complex of protein molecules in a cell membrane that form a pore through which ions can pass.
Created by: AdamsD20