Term
| 5 ways to increase movement across membrane |
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Definition
1) increase gradient
2) increase permeability
3) increase surface area
4) smaller molecules
5) decrease travel distance |
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Term
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Definition
| only certain molecules are able to pass through |
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Term
| 4 types of passive transport |
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Definition
| simple diffusion, osmosis, filtration, and facilitated diffusion (DOES NOT REQUIRE ATP) |
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Term
| passive transport involves the movement... |
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Definition
| movement of molecules down a gradient (high to low) |
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Term
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Definition
| movement of lipid soluble molecules across a membrane by squeezing through the lipid bilayer |
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Term
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Definition
| movement of water across a membrane |
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Term
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Definition
| pressure that drives the movement of water |
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Term
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Definition
| 280 to 300 mOsm/L or mOsm/kg |
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Term
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Definition
| unitless comparison of osmolarity between two fluids |
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Term
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Definition
| lower concentration of solutes; water moves away from a hypotonic fluid |
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Term
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Definition
| higher concentration of solutes; water moves toward a hypertonic fluid |
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Term
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Definition
| equal concentration of solutes inside and outside; no net movement of water |
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Term
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Definition
| movement of fluid across a membrane |
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Term
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Definition
| pressure that drives the movement of fluid |
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Term
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Definition
| movement of molecules via transport proteins (channels, carriers) |
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Term
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Definition
| directly proportional to the concentration of molecules |
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Term
| saturation of transporter |
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Definition
| occurs when molecules reach a concentration that overwhelms the transporter |
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Term
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Definition
| movement of molecules across the membrane with the requirement of ATP |
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Term
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Definition
| direct use of ATP; transport of molecules across the membrane against a concentration gradient |
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Term
| secondary active transport |
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Definition
| uses ATP indirectly; transport of a molecule against its concentration gradient via the aid of another molecule down its concentration gradient |
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Term
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Definition
| movement of substances into cells via vesicles at the cell surface |
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Term
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Definition
1) phagocytosis
2) pinocytosis
3) receptor mediated endocytosis |
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Term
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Definition
| movement of substances out of a cell via vesicles at the cell surface |
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Term
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Definition
| process of transporting substances through a cell (combination of receptor mediated endocytosis and exocytosis) |
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