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9 Cards in this Set
- Front
- Back
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What is diffusion |
It is the net movement of particles from a region of high concentration to a region of lower concentration down a concentration gradient until equilibrium is reached |
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How does the diffusion experiment with ammonia gas work |
Strips of litmus paper are put in a test tube and a cotton wool soaked in ammonia is put it one end of the test tube. Ammonia diffuses and the strips closer to the wool turn blue first |
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What happens when potassium permanganate molecules are mixed with water |
They diffuse until equilibrium is reached |
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When does diffusion work in living organisms |
There is a concentration gradient |
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Where does most of the carbon dioxide in a leaf go? How does the carbon dioxide go there? And why does the spongy mesophyll have air spaces? |
At the top to the palisade mesophyll cells. Diffusion To allow for diffusion |
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How does diffusion occur in the ileum |
When there is a higher concentration of food molecules in the ileum than the bloodstream they will diffuse passively. |
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What happens if the concentration gradient in the ileum is not steep enough and diffusion can no more occur |
Active transport |
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Which factors affect the rate of diffusion |
Temperature Distance Surface area Size of molecules Concentration gradient |
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When Gases diffuse in an organism they first _________ in water |
Dissolve |
