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20 Cards in this Set
- Front
- Back
a type of endocytosis involving large, particulate substances, accomplished mainly by macrophages, neutrophils, and dendritic cells
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Phagocytosis
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Trans-membrane protein that helps a certain substance or class of closely related substances to cross the membrane.
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Transport Protein
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a special transport protein in the plasma membrane of animal cells that transport sodium out of the cell and potassium into the sell against the concentration gradients
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Sodium-potassium pump
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a property of biological membranes that allows some substances more easily than others
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Selective permeability
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the movement of specific molecules into a cell by the inward budding of membranous vesicles containing proteins with receptor sites specific to the molecules being taken in; enable a cell to acquire bulk quantities of specific substances.
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receptor-mediated endocytosis
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a type of endocytosis in which the cell ingests extracellular fluid and it's dissolved solutes.
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Pinocytosis
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a protein appendage loosely bound to the surface of a membrane and not embedded in a lipid bilayer
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Peripheral Protein
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the diffusion of a substance across a biological membrane
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Passive Transport
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diffusion of water across a semi-permeable membrane
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Osmosis
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molecule that binds specifically to a receptor site of another molecule
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Ligand
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Having the same solute concentration as another solution
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Isotonic Solution
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typically a trans-membrane protein with hydrophobic regions that completely spans the hydrophobic interior of the membrane
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integral protein
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in comparing two solutions, referring to the one with the lower solute concentration
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Hypotonic Solution
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in comparing two solutions, referring to the one with the greater solute concentration
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Hypertonic Solution
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a protein channel in a cell membrane that opens or closes in response to a particular stimulus
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Gated Channel
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the spontaneous passage of molecules and ions, bound to specific carrier proteins, across a biological membrane down their concentration gradients
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Facilitated Diffusion
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the cellular secretion of macromolecules by the fusion of vesicles with the plasma membrane
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Exocytosis
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the cellular uptake of macromolecules and particulate substances by localized regions of the plasma membrane that surround the substance and pinch off to form an inter-cellular vesicle
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Endocytosis
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the spontaneous tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated
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Diffusion
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a coupling of the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient.
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Cotransport
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