Assume that glucose is transported across a membrane at 3 × 10–10 mol/(cm2·s). b

Question

Assume that glucose is transported across a membrane at 3 × 10–10 mol/(cm2·s).

b) What would be the effect on the net rate of transport for a synthetic membrane that is 15% thinner? (The ratio of the concentration of glucose outside to the concentration of glucose inside remains the same.)

a. The net rate will increase.
b. The net rate will decrease.
c. The net rate will remain the same.


hint:

J=[-KD1 (C2-C1)]/l


where J is the net rate of transport

K is the partition coefficient
D1 is the diffusion coefficient in cm2/s
C2–C1 is the concentration difference across the membrane
l is the thickness of the membrane in cm

Explanation / Answer

b. The net rate will decrease.

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