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A+P Lab Quiz #1
Diffusion and Osmosis
| Term | Definition |
|---|---|
| Solute | a molecule that is dissolved or broken down into smaller molecules or ions |
| Solvent | the liquid in which a solute is dissolved |
| Concentration Gradient | an area of high concentration to an area of lower concentration |
| Diffusion | the natural movement of a solute down its concentration gradient |
| Factor that Affect the Rate of Diffusion | molecular weight, [ ] gradient, membrane SA, and permeability (density) |
| Osmosis | the diffusion of water across a selectively permeable membrane that occurs when solute cannot move across a [ ] gradient due to a barrier |
| Lyse | swelling that occurs when a cell takes in too much water, often due to a hypotonic environment |
| Isotonic Solution | a solution that has an equal [ ] to the cell, no movement of water needed |
| Crenate | shriveling that occurs when a cell loses too much water, often due to a hypertonic solution |
| How do blood cells appear to the human eye when crenated? Lysed? | Crenated cells must be viewed under a microscope as they will maintain opaque as healthy cells do in a solution. Lysed cells can be determined upon first glance as they will have burst, causing the solution to become transparent and the rest to settle. |
Created by:
MadisonFoleyReis
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