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Wilkins AP Bio Cell Transport Flashcards

Covers general terms for cellular transport for AP Biology.

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7901646387Selectively Permeablea property of cell membranes that allows some substances to pass through, while others cannot0
7901646388Phospholipid Bilayerdouble layer of phospholipids that makes up plasma and organelle membranes1
7901646389Integral Proteinspenetrate the hydrophobic core and often span the membrane2
7901646390Peripheral ProteinsBound to the inner or outer surfaces of the membrane and are easily separated from it.3
7901646391Glycoproteinsproteins that have carbohydrates covalently bonded to them4
7901646392Glycolipidslipid that have carbohydrates covalently bonded to them5
7901646393Passive Transporttransport that does not require the cell to expend energy (high to low concentration)6
7901646394Active Transportenergy-requiring process where a substance moves against the concentration gradient (low to high concentration)7
7901646395Diffusionnet movement of a substance down a concentration gradient (high to low)8
7901646396Facilitated Diffusiondiffusion of solutes across a membrane, with the help of transport proteins9
7901646397Osmosisdiffusion of water across a selectively permeable membrane10
7901646398Hypertonicsolute concentration is greater than inside the cell, cell loses water; plant cells plasmolyze, animal cells crenate11
7901646399Hypotonicsolute concentrations in less than inside the cell, cell gains water; animal cells lyse, plant cells have ideal turgor pressure12
7901646400Isotonicsolute concentrations are the same on both sides of the membrane, cell does not gain or lose water; ideal condition for animal cells13
7901646401Sodium-Potassium Pumpactively pumps Na+ ions out and K+ ions in, 3 Na leave for every 2 K that enter14
7901646402Proton Pumppumps (H+ ions) out of the cell, creating a proton gradient, protons diffuse back into the cell, which powers ATP production15
7901646404Exocytosisexporting macromolecules by fusion of vesicles with the plasma membrane16
7901646405Endocytosisimporting macromolecules by forming vesicles derived from plasma membrane17
7901646406Phagocytosispart of the cell membrane engulfs large particles or entire cells (cell eating)18
7901646407Pinocytosispart of the cell membrane engulfs small dissolved substances or fluid droplets in vesicles (cell drinking)19
7901646408Receptor-Mediated Endocytosisimporting of specific macromolecules by receptor proteins bind to a specific substance which triggers the inward budding of vesicles formed from coated pits20
7901646409Ligandsmolecule that binds to the specific receptor site on another molecule21
7901646411Fluid Mosaic Modelstates that the membrane is a fluid structure with a mosaic of various proteins embedded in it22
7901646412Transport Proteinsallow passage of hydrophilic substances across the membrane23
7901646413Concentration Gradienta difference in concentration across a distance24
7901646414Turgor Pressurethe pressure that is exerted on the inside of cell walls, caused by the movement of water into the cell25
7901646416Aquaporinsfacilitates the passage of water into a cell26
7901646417plasmolysisAs a plant cell loses water, it shrivels, and its plasma membrane pulls away from the cell wall27
7901646419cholesterolA large, ring shaped lipid found in cell membranes. Its presence helps to maintain flexibility and fluidity in the membrane.28
7901662764water potentiala measurement that combines the effects of solute concentration and pressure to predict the direction water will flow29
7901676018solute potential-iCRT, component of water potential which is proportional to its molarity30
7901694076pressure potentialcomponent of water potential which is the physical pressure on a solution31

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