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17 Cards in this Set
- Front
- Back
Movement of a substance without the use of energy by the cell
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Passive Transport
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A difference in the concentration of a substance across a space
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Concentration Gradient
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State in which the concentration of a substance is equal throughout a space
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Equilibrium
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Random movement of particles from an area of high concentration to an area of lower concentration
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Diffusion
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Movement of water through a selectively permeable membrane from an area of high concentration to an area of lower concentration
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Osmosis
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A solution that causes a cell to shrink because of osmosis
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Hypertonic Solution
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A solution that causes a cell to swell because of osmosis
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Hypotonic Solution
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A solution that causes no change in cell size
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Isotonic Solution
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Transport protein in a cell membrane through which ions can pass
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Ion Channel
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Transport protein that carries a specific substance across a cell membrane
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Carrier Protein
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Transport of substances through a cell membrane down a concentration gradient aided by the carrier proteins
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Facilitated Diffusion
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Movement against a concentration gradient requiring the use of energy by the cell
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Active Transport
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Carrier protein that transports sodium ions out of a cell and potassium ions into the cell
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Sodium-Potassium Pump
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Movement of a substance by a vesicle to the inside of a cell
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Endocytosis
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Movement of a substance by a vesicle to the outside of the cell
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Exocytosis
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Protein that binds to specific signal molecules, causing the cell to respond
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Receptor Protein
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Signal molecule produced in response to the binding of a chemical signal; alters the chemical activity within the cell
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Second Messenger
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