Flashcards
1.4 - Membrane transport - Key terms
Cards in this deck (14)
- 1Passive transportThe transport of a molecule across a cell membrane by diffusion.
- 2Active transportA process that moves chemicals across a cell membrane against a concentration gradient, using energy (ATP)
- 3DiffusionThe process by which molecules of gas or liquid move from an area of high concentration to an area of lower concentration.
- 4OsmosisMovement of water across a partially permeable membrane from a dilute solution to a more concentrated one, without the use of energy.
- 5Facilitated diffusionMovement of specific molecules across cell membranes through protein channels.
- 6VesiclesMembrane bound compartments in eukaryotic cells.
- 7EndocytosisCellular uptake of biological molecules via the formation of vesicles from the plasma membrane surrounding the molecule.
- 8ExocytosisA process in which a vesicle inside a cell fuses with the plasma membrane releasing its contents to the external environment.
- 9Potassium channelA carrier protein in membranes which allows potassium to move out of a cell by facilitated diffusion.
- 10OsmolarityA measure of the concentration of solute particles (which cause osmosis) in a given volume of fluid.
- 11HypotonicA solution whose solute concentration is lower than the solute concentration of another solution.
- 12HypertonicA solution whose solute concentration is higher than the solute concentration of another solution.
- 13Kidney dialysisA process in which a machine uses osmosis and diffusion to filter urea salts and water from blood, in place of the kidneys.
- 14Diffusion gradientThe difference in molecular concentration that allows diffusion to occur.
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- International Baccalaureate Biology (1 - Cell Biology) Flashcards on 1.4 - Membrane transport - Key terms, created by Ella-mentary on 15/01/2016.
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- Ella-mentary · Jan 2016
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- Feb 19, 2016
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