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Definition
| the process of random movement towards a state of equilibirum |
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| the movement of water across a permeable membrane, from one region to another region where the water potential is more negative |
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| solutions have equal solute concentrations |
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| solution has a higher solute concentration than the other solution with which it is being compared |
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| solution has a lower solute concentration than the other solution with which it is being compared |
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| keeps plants upright and is the driving force for the enlargement of plant cells. |
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Definition
| passive movement through a membrane involving a specific carrier protein; does not proceed against a concentration gradient. |
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| opens when something happens to change the 3D shape of a protein |
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Definition
| consists of a carbohydrate covalently bonded to a protein |
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Definition
| consist of a carbohydrate covalently bonded to a lipid |
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| specialized structures that link adjacent epithelia cells |
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| connect adjacent plasms membranes |
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| facilitate communication between cells |
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| a cytoplasmic strand connecting 2 adjacent plant cells |
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| plaque that is attached to fibers in the cytoplasm |
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| binding of a chem. signal |
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| an electrical charge causes an imbalance of ions |
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| in facilitated diffusion, a membrane protein that binds a specific molecule and transports it through the membrane |
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Definition
| the movement of a substance across a biological membrane against a concentration gradient--requires the expenditure of chemical energy |
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Definition
| move a single substance in one direction |
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Definition
| move two substances in the same direction |
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| move two substances in opp. directions |
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| found in all animal cells. the pump is an integral membrane glycoprotein |
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| secondary active transport |
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Definition
| the movement of a substance against its concentration gradient is accomplished using energy "regained" by letting ions move across the membrane with their concentration gradient. |
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| a process by which a vesicle within a cell fused with the plasma membrane and releases its contents to the outside |
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| a process by which liquids or solid particles are taken up by a cell thru. invagination of the plasma membrane |
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Definition
| "cellular eating" part of the plasma membrane engulfs large particles or even entire cells |
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Term
| Receptor mediated endocytosis |
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Definition
| specific reactions at the cell surface trigger the uptake of specific materials |
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Definition
| 1 imporant function of membranes is to keep diff. materials separate from one another |
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| the genus halobacterium ("salt" or "ocean bacterium") consists of several species of archaea with an aerobic metabolism which requires an environment with a high concentration of salt |
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| a protein used by archaea, most notably halobacteria. captures light energy and uses it to move protons across the membrane out of the cell |
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