Vocabulary words from the AP Edition of Campbell Biology, Chapter 7.
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| 235192505 | selective permeability | allowing some substances to cross more easily than others | 0 | |
| 235192506 | amphipathic | having both a hydrophilic and hydrophobic region | 1 | |
| 235192507 | fluid mosaic model | depicts the membrane as a fluid structure with a "mosaic" of various proteins embedded in or attached to a double layer of phospholipids | 2 | |
| 235192508 | integral proteins | proteins that penetrate the hydrophobic core of the lipid bilayer | 3 | |
| 235192509 | peripheral proteins | proteins that are not embedded in the lipid bilayer at all | 4 | |
| 235192510 | glycolipids | carbohydrates covalently bond to lipids to form this molecule | 5 | |
| 235192511 | glycoproteins | carbohydrates covalently bond to proteins to form this molecule | 6 | |
| 235192512 | transport proteins | helps a substance or class of closely related substances cross the membrane | 7 | |
| 235192513 | aquaporins | a transport protein in the plasma membrane that facilitates diffusion of water through the membrane | 8 | |
| 235192514 | diffusion | the movement of molecules of any substance so that they spread out evenly into the available space | 9 | |
| 235192515 | concentration gradient | the region along which the density of a chemical decreases | 10 | |
| 235192516 | passive transport | the diffusion of a substance across a biological membrane | 11 | |
| 235192517 | isotonic | a solution whose solute concentration is equal to the solute concentration inside a cell | 12 | |
| 235192518 | hypertonic | a solution whose solute concentration is higher than the solute concentration inside a cell | 13 | |
| 235192519 | hypotonic | a solution whose solute concentration is lower than the solute concentration inside a cell | 14 | |
| 235192520 | osmoregulaltion | control of water balance | 15 | |
| 235192521 | turgid | very firm | 16 | |
| 235192522 | flaccid | limp | 17 | |
| 235192523 | plasmolysis | the contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis | 18 | |
| 235192524 | facilitated diffusion | movement of specific molecules across cell membranes through protein channels | 19 | |
| 235192525 | ion channels | specific channels for each ion, respond to stretching of cell membrane,electrical signals, or chemicals | 20 | |
| 235192526 | gated channels | open or close in response to a stimulus | 21 | |
| 235192527 | active transport | the movement of materials through a cell membrane using energy | 22 | |
| 235192528 | sodium-potassium pump | exchanges sodium for potassium across the plasma membrane of animal cells | 23 | |
| 235192529 | membrane potential | the voltage across a membrane | 24 | |
| 235192530 | electrochemical gradient | combination of forces acting on an ion | 25 | |
| 235192531 | electrogenic pump | an ion transport protein that generates voltage across a membrane | 26 | |
| 235192532 | proton pump | the main electrogenic pump of plants, fungi, and bacteria | 27 | |
| 235192533 | cotransport | coupling the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient | 28 | |
| 235192534 | exocytosis | secretion of biological molecules by the fusion of vesicles with the plasma membrane | 29 | |
| 235192535 | endocytosis | cell take in biological molecules and particulate matter by forming new vesicles from the plasma membrane | 30 | |
| 235192536 | phagocytosis | phagocytes engulf and digest microorganisms and cellular debris | 31 | |
| 235192537 | pinocytosis | certain cells can engulf and incorporate droplets of fluid | 32 | |
| 235192538 | receptor-mediated endocytosis | specific molecules move into a substance by the inward budding of membranous vesicles | 33 | |
| 235192539 | ligands | any molecule that binds specifically to a receptor site of another molecule | 34 |
