Term
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Definition
| Movement of solutes from an area of HIGH solute concentration to LOW solute concentration so the concentrations can eventually be equalized. |
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Term
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Definition
| Movement of water through a selectively permeable membrane from an area of high water concentration to low water concentration. PASSIVE |
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Term
| What is a selectively permeable membrane? |
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Definition
| They allow some substances to move easily into and out of the cell while completely excluding others. |
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Term
| What is a concentration gradient? |
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Definition
| The differences in the concentrations of solutions that cause solutes or solvents to move to a lower concentration. |
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Term
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Definition
| What is dissolved in the solvent |
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Term
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Definition
| What the solutes are dissolved in |
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Term
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Definition
| a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent). |
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Term
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Definition
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Term
| What does hypotonic mean? |
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Definition
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Term
| What does hypertonic mean? |
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Definition
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Term
| In the experiment with dialysis bags, #1 had dH2O inside the bag and in the beaker. What was the bag in relation to the beaker? What happened? |
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Definition
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Term
| #2 Had 15% sucrose in the bag and H2O in the beaker. What was the bag in relation to the water? What happened? |
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Definition
| Hypertonic. The bag gained water because the concentration of water outside the bag was higher than inside the bag. |
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Term
| #3 had 30% sucrose in the bag and H2O in the beaker? What was the bag in relation to the beaker? What happened? |
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Definition
| Hypertonic. The bag gained water at a faster rate than #2 because the gradient was steeper. |
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Term
| #4 had H2O in the bag and 30% sucrose in the beaker. What was the bag in relation to the beaker? What happened? |
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Definition
| Hypotonic. The bag lost water because the concentration inside the bag was higher than that of the beaker. |
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Term
| What happened to the RBC in the 0.9% sodium chloride solution? |
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Definition
| NOTHING. They are isotonic. |
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Term
| What happened to the RBC in the .45% NaCl solution? |
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Definition
| The red blood cell lysed. |
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Term
| What happened to the RBC in the 20% NaCl solution? |
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Definition
| The red blood cell crenated. |
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Term
| What happened when the plant cell was placed in 20% NaCl solution? |
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Definition
| It plasmolyzed. Cytoplasm pulls away from membrane due to water leaving the cell. |
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Term
| What happened when the elodea cell was placed in dH2O? |
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Definition
| It experience high turgid pressure. Cytoplasm swells due to water entering the cell. |
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Term
| Why do plant cells not burst when animal cells do? |
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Definition
| Because animal cells lack a cell wall and plant cells have one. |
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Term
| Which solute in our experiment diffused the slowest? Fastest? Why? |
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Definition
Aniline blue. Potassium Dicrhomate.
Aniline is the biggest in molar weight and potassium dichromate is the smallest. |
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Term
| What happened in the bag experiment Dr. C did? |
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Definition
Starch and glucose were in the bag and the beaker was filled with iodine.
The bag changed color and the beaker did not. Starch is too big of a molecule to diffuse out of the bag, the iodine was small enough to diffuse into the bag, and the sucrose was small enough to diffuse into the beaker. |
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Term
| When the beaker was tested with Benedict's solution, what happened? |
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Definition
The contents were blue/green with red specks in the tube. This proves that the sucrose diffused out of the bag/into the beaker providing a positive result for simple sugar.
The bag turned purple when tested because Iodine was in it. |
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Term
| What moved where during this experiment? |
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Definition
Iodine - moved INTO the bag
Sucrose - moved INTO the beaker
Starch - moved NOWHERE |
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Term
| What is the rate of diffusion? |
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Definition
Distance/elapsed time
mm/mins |
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