How is it that diffusion coefficients measured for lipidswithin membranes tend to be closer to that expected for freediffusion than those measured for integral proteins in the samemembranes?
How is it that diffusion coefficients measured for lipidswithin membranes tend to be closer to that expected for freediffusion than those measured for integral proteins in the samemembranes?
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| Simple diffusion | Facilitated diffusion | Active transport |
The ratios of staurated to unsturated phosphlipids in an organism's membranes can change in response to changes in environmental conditions.
a. How do the properties of a membrane that contains a low percentage of unsturated phospholipids compare with those of a membrance that contains a high percentage of unsaturated phospolipids?
b. Considering what you know about the properties of staurated and unsaturated fatty acids, would you expect an amoeba that lives in a pond in a cold northern climate to have a higher or lower percentage of saturated fatty acids in its membranes during the summer as compared to the winter? Explain your answer.
