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18 Cards in this Set
- Front
- Back
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a diffrence in the concentration of a substance across a distance
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concentrationgradient
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the movement of chemical substances, usually across the cell membrance, against a concentration gradient, requires cell to use energy
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active transport
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the process by which a cell engulgs large particles or whole cells, either as a defence mechanism or as a means to obtain food
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phasocytesis
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describes a solution whose solute concentration is lower than the solute concentration inside a cell
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hypotonic
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a small sac that surrounds the materials to be taken into the cell or transported within the cell
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yesicle
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a carrier protein that uses atp to actively transport sodium ions out of a cell and potassium ions into the cell
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sodium potassim pump
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the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins
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facilitateddiffusion
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describes a solutioin whose solute concentrationi is higher than the solute inside a cell
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hypertonic
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the diffusion of water from a more dilute solution to a more concentrated solution through a membrane
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osmosis
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the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell
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endocytosis
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the movement of particles from regions of higher density to regions of lower density
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diffusion
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the bursting of a cell
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cytolysis
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describes a solution whose solute concentratiopn is equal to the solute concentration inside a cell
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isotonic
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a method of active transport across the cell membrance in which the cell takes in extracellular fluids
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pinocytosis
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the movement of substances across a cell membrane without the use of energy by the cell
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passive transport
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the contraction or shrinking of the cell membrane of a plant cell in hypertonic solutioin in response to the loss of water by osmosis
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plasmolysis
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the proscess by which a substance is released from the cell through a vesicle that fuses with the membrane to let the substance out
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exocytosis
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in biology, a stat that exists when the concentrationi of a substance is the same throughout a space
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equilibrium
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