| 21. | This is also referred to as the movement of a substance down a concentration gradient.
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| 22. | In dialysis and pervaporation the chemical potential along a concentration gradient is the driving force.
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| 23. | Gases may diffuse in either direction depending on the concentration gradient between the two layers.
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| 24. | In the case of dialysis, the driving concentration gradient in the membrane is reduced.
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| 25. | Facilitated diffusion may be achieved as a consequence of charge gradients in addition to concentration gradients.
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| 26. | He presented the sequences nonlinear concentration gradient, prompting a whimsical article in the popular press.
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| 27. | A morphogen spreads from a localized source and forms a concentration gradient across a developing tissue.
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| 28. | This is due to urea entering the cell down its concentration gradient, followed by water.
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| 29. | Alarmingly, concentration gradient was a redlink, so I've redirected it to diffusion.
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| 30. | Ions diffuse across their concentration gradient from the fluids of the tuna to the external seawater.
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