Describe two variables that affect the rate of diffusion. a.
There are alot of different variables or factors that can affect the rate of diffusion, for example: size of the molecule, shape of the molecule, concentration gradient, charge of the ions, temperature, environment, etc. The rate of the diffusion can increase as diffusion distance increases, concentration gradient increases, surface area increases, temperature increases, and many more. 2.
Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? a.
I think the urea was not able to diffuse through the 20 MWCO membrane because the urea was too big to pass through. 3.
Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction. a.
Between the attempts to diffuse glucose and albumin through the 200 MWCO membrane, the results for both were that glucose was diffuse but the albumin did not. Comparing to my prediction, the results were a bit different. I predicted that both were able to diffuse, but at the end, only glucose diffused. 4.
Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. a.
Sodium chloride, urea, glucose, albumin
Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs. a.
Simple diffusion moves molecules from an area of higher concentration to an area of lower concentration without an input of energy. Facilitated diffusion follows the same rules as regular diffusion (higher to lower concentration and no energy input), but uses protein carrier molecules to allow substances that are fat soluble to diffuse through the cell membrane. Simple diffusion allows non-polar molecules to pass through and a little amount of H20. On the other hand, Facilitated diffusion allows ions and...
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