Term
| movement of molecules from areas of high concentration to areas of low concentration |
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Definition
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Term
| diffusion; active or passive transport |
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Definition
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Term
| movement of H2O molecules from areas of high concentration to areas of low concentration across a membrane |
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Definition
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Term
| osmosis; active or passive transport |
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Definition
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Term
| movement from high concentration to low concentration using a carrier molecule |
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Definition
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Term
| facilitated diffusion; active or passive transport |
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Definition
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Term
| transport that does not require energy from the cell |
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Definition
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Term
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Definition
| taking fluid into the cell |
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Term
| pinocytosis; active or passive transport |
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Definition
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Term
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Definition
| taking molecules into cell |
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Term
| phagocytosis; active or passive transport |
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Definition
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Term
| phagocytosis and pinocytosis are types of___ |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| exocytosis is used by cells to remove___ |
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Definition
| waste products from the cell |
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Term
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Definition
| transport that requires energy from the cell |
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Term
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Definition
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Term
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Definition
| allows some substances to cross more easily than others |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| has both a hydrophilic region and hydrophobic region |
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Term
| unique physical environment characterized by a membrane as a fluid structure with proteins embedded or attached to a bilayer of phospholipids |
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Definition
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Term
| in a phospholipid bilayer, the hydrocarbon tails are ________ |
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Definition
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Term
| membrane proteins are _____, just like the phospholipid bilayers they are embedded in |
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Definition
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Term
| proteins that never move within the membrane are anchored by the _________ |
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Definition
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Term
| temperature influences membrane _________ |
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Definition
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Term
| membranes rich in unsaturated hydrocarbons are more fluid because _______ |
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Definition
| the kinks in the hydrocarbon tails prevent close packing |
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Term
| determine most of the membrane's specific functions |
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Definition
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Term
| 2 types of membrane proteins: |
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Definition
1. peripheral proteins
2. integral proteins |
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Term
| proteins not embedded in the lipid bilayer |
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Definition
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Term
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Definition
| penetrate the hydrophobic core of the lipid bilayer, often spanning the membrane (transmembrane protein) |
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Term
| on the exterior of the membrane, some proteins attach to fibers of the _______ |
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Definition
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Term
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Definition
| a cell's ability to distinguish one type of neighboring cell from another |
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Term
| membrane carbohydrates are important for ___ |
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Definition
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Term
| membrane carbohydrates covalently bond with lipids to form ___ |
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Definition
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Term
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Definition
| formed when membrane carbohydrates bond covalently with proteins |
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