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AP Biology Cell Membrane Flashcards

Cell membrane structure and functions

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15225683037Selective PermeabilityAllows some substances to cross more easily than others0
15225683038Amphipathicmolecule that has both a hydrophillic region and a hydrophobic region such as a phosopholipid1
15225683040Integral ProteinsProteins that extend through the phospholipid bilayer.2
15225683042Glycoproteinsproteins that have carbohydrates covalently bonded to them3
15225683044Concentration Gradienta difference in the concentration of a substance across a space4
15225683046OsmosisThe diffusion of water across a selectively permeable membrane5
15225683047Transport Proteinsproteins that help to transport substances across cell membranes6
15225683048AquaporinsChannel proteins that help massive amount of water pass through the membrane; a lot in our kidneys7
15225683049Passive Transportmovement of materials through a cell membrane without using energy8
15225683050Isotonica solution whose solute concentration equals that inside a cell; the cell will not change9
15225683051Hypertonicthe solution with the greater concentration of solutes than that inside the cell; the cell will lose water to its environment--> Cell will shrivel up10
15225683052Hypotonicthe solution with the lower concentration of solutes than that inside the cell; water will enter the cell -> Cell will swell and burst11
15225683053OsmoregulationThe control of water balance12
15225683055PlasmolysisAs a plant cell shrivels its plasma membrane pulls away from the wall13
15225683056Facilitated Diffusionpassive transport of ions or polar molecules across a plasma membrane by transport proteins14
15225683057Active Transporttransport of a substance through a cell membrane against the concentration gradient; requires energy15
15225683059Exocytosisprocess by which a cell releases large amounts of material by vesicles16
15225683060Endocytosisthe movement of a substance into a cell by a vesicle17
15225683061Phagocytosisa type of endocytosis in which microbes are taken in by immune cells of animals (mainly by macrophages)18
15225683062Pinocytosiscellular drinking19
15225683063Receptor-mediated endocytosisTaking in large amount of specific substances by binding to receptors, which form vesicles and are then taken in by the cell20
15225794403Phosphataseenzyme that removes a phosphate21
15225801979second messengera substance inside a cell that brings about response by cell22
15225823421Trabsductionconversion of signal from outside cell to for that can bring about a specific cellular response23
15225852581Steroidslipids characterized by a carbon skeleton consisting of four fused rings24
15225855714Receptorbinds to chemical messengers such as hormones sent by other cells25
15225864812Glycolipidscarbohydrates covalently bonded to lipids26
15225878501channel proteinsfacilitate the transport of substances across a cell membrane27
15225882954carrier proteinsa protein that transports substances across a cell membrane (Binds to shape)28
15225892185g proteinGTP binding protein that relays signals from plasma membrane signal reception29
15225902662hormonea secreted chemical that acts on specific target cells in other parts of the body30
15225919523ligandA molecule that binds specifically to another molecule, usually a larger one.31
15225927552protein kinaseone of a group of enzymes that activate or inactivate other proteins by phosphorylating (adding phosphate groups) to them32
15225939000paracrine signalingsecreted molecules diffuse locally and trigger a response in neighboring cells33
15225949139synaptic signalingelectrical signal along a nerve cell releases chemical signal in form of neurotransmitters and stimulates a cell across synapse34
15225960956endocrine signalingSpecialized cells release hormone molecules into vessels of the circulatory system, by which they travel to target cells in other parts of the body.35

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