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15 Cards in this Set
- Front
- Back
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Phospholipid Composition |
2 fatty acids+glycerol+1 phosphate+1 small molecule amphipathic |
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Membrane Protein Functions |
transport enzymatic activity signal transduction cell-to-cell recognition intercellular joining attachment to cytoskeleton or ECM |
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Integral Proteins |
penetrate hydrophobic interior of lipid bilayer |
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Peripheral Proteins |
loosely bound to surface of membrane |
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Fluid Mosaic Model |
membrane is a fluid structure with mosaic of proteins attached to bilayer of phospholipids |
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Active Transport |
pump a solute against its gradient uses energy carrier proteins ex. sodium potassium pump |
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Diffusion |
molecules moving so they spread evenly into available space diffuse down concentration gradient passive transport |
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Facilitated Diffusion |
molecules and ions impeded by bilayer diffuse passively with transport proteins |
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Channel Proteins |
provide corridors that allow molecules to cross membrane |
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Carrier Proteins |
change shape, passive |
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Electrogenic Pump |
transport protein generates voltage across a membrane ex. sodium-potassium pump |
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Endocytosis |
cell takes in biological molecules and particulate matter by farming new vesicles from plasma membrane (bulk transport) |
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Exocytosis |
cell secretes biological molecules by fusion of vesicles with plasma membrane |
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Ligands |
molecule that bind to receptor site on another molecule ex. low density lipoproteins |
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Co-transport |
ATP powered pump that transfers a specific solute can drive active transport of solutes |
