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Bio Ch. 5 Vocab.
| Question | Answer |
|---|---|
| Concentrations Radient | A difference in the concentration of a substance across a distance |
| Diffusion | The movement of particles from regions of higher density to regions of lower density |
| Equilibrium | A state that exists when the concentration of a substance is the same throughout a space |
| Facilitated Diffusion | The transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins |
| Hypertonic | A solution whose solute concentration is lower than the solute concentration inside a cell |
| Isotonic | A solution whose solute concentration is equal to the solute concentration inside a cell |
| Osmosis | The diffusion of water or another solvent from a more dilute solution to a more concentrated solution through a membrane that is permeable to the solvent |
| Passive Transport | The movement of substances across a cell membrane without the use of energy by the cell |
| Turgor Pressure | The pressure that is exerted on the inside of the cell walls and that is caused by the movement of water into the cell |
| Contractile Vacule | An organelle that accumulates water and then releases it periodically to maintain osmotic pressure |
| Cytolysis | The bursting of a cell |
| Active Transport | Movement of chemical substances across the cell membrane against the concentration gradient and it requires energy |
| Endocytosis | The process by which a cell membrane surrounds a particle in a vesicle to bring that particle into the cell |
| Exocytosis | Vesicle releases substances from the cell by fusing with the cell membrane |
| Phagocyte | A cell that ingests and destroys foreign matter and microorganisms |
| Vesicle | Small cavity or sac that contains materials and forms when the cell membrane surrounds materials |
| Carrier Protein | A protein that transports substances across a cell membrane |
| Plasmolysis | The shrinking of the cell membrane in a hypertonic solution |
| Pinocytosis | Method of active transport in which the cell takes in extracellular fluids |
| Phagocytosis | The process by which a cell engulfs large particles or whole cells |
| Sodium Potassium Pump | A carrier protein that uses ATP to actively transport sodium ions out and potassium ions in |
| Ion Channel | A complex of protein molecules that form a pore through which ions can pass through the cell membrane |
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archergirl
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