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sally chp. 4 bio
| Question | Answer |
|---|---|
| The movement of substances across a cell membrane without the use of energy by the cell. | Passive Transport |
| A difference in the concentration of a substances across a distance. | Concntration Gradient |
| In chemistry, the state in which a chemical reaction and the reverse chemical reaction occur at the same rate such that the concentrations of reactants and products do mot change. | Equilibrium |
| The movement of particles from regions of higher density to regions of lower density. | Diffusion |
| The diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permeable to the solvent. | Osmosis |
| Describes a solution whose solute concentration is higher than the solute concentration inside a cell. | Hypertonic Solution |
| Descirbes a solution whose solute concentration is lower than the solute concentration inside a cell. | Hypotonic Solution |
| A solution whose solute concentration is equal to the solute concentration inside a cell. | Isotonic Solution |
| A pore in a cell membrane through which ions can pass. | Ion Channel |
| A protein that transports substances across a cell membrane. | Carrier Protein |
| The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins. | Facilitated Diffusion |
| The movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy. | Active Transport |
| A carrier protein that uss ATP to actively transport sodium ions out of the cell and potassium ions into the cell. | Sodium-Potassium Pump |
| The process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell. | Endocytosis |
| The process by which a substance s released from the cell through a vesicle that transport the substance to the cell surface and then fuses with the membrane to let the substance out. | Exocytosis |
| A protein that binds specific singal molecules, which causes the cell to respond. | Receptor Protein |
| A molecule that is generated when a specific substance attaches to a receptor on the outside of a cell membrane, which produces a change in celluar function. | Second Messenger |
Created by:
ohawkins
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