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17 Cards in this Set
- Front
- Back
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Diffusion |
Movement of molecules from regions of high concentrations to regions of low concentrations |
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Osmosis |
Movement of water molecules from region of low solute concentration to areas of high solute concentration (high [water] to low [water]) |
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Isotonic |
Solute concentration outside=inside of cell Normal for animal cells Bad for plant cells (flaccid) |
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Hypotonic |
Solute concentration outside Bad for animal cells (lysed) Normal for plant cells (turgid) |
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Hypertonic environment |
Solute concentration outside>inside of cell Bad for animal cells (shriveled) Bad for plant cells (plasmolyzed) |
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Plasmolysis |
Inside of cell being pulled away from cell membrane- not enough solute in the cell |
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Lysing |
Cell "exploding"- too much solute |
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Transport proteins |
Integral membrane proteins that preform active transport |
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Facilitated diffusion |
Natural gradient- high to low concentrations |
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Active transport |
Against gradient, requires ATP |
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Sodium/potassium pumps |
Requires ATP to transport K+ and Na+ |
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Cotransport |
Entry of one molecule powers the import or export of another molecule |
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Symporters |
Imports/exports in same direction as original molecule |
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Exocytosis |
Vesicles fuse with plasma membrane and discharge contents |
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Endocytosis |
Cell engulfs large or small objects with its plasma membrane |
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Phagocytosis |
"Cell eating"- cell extends towards object and engulfs it |
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Pinocytosis |
"Cell drinking"- non-specific uptake of membrane into vesicles |
