According to Fick's law of diffusion, which of the following changes would decrease the rate of net diffusion of a substance across a membrane?
A) an increase in the substance's concentration gradient
B) an increase in the permeability of the membrane to the substance
C) an increase in the surface area of the membrane
D) an increase in the thickness of the membrane
E) none of these answers.

Question

Quizplus · Accepted Answer

Fick's law of diffusion states that the rate of net diffusion of a substance across a membrane is proportional to the concentration gradient, the permeability of the membrane, and the surface area of the membrane, but inversely proportional to the membrane thickness. Therefore, an increase in membrane thickness would decrease the rate of net diffusion. Choices A, B, and C would all increase the rate of net diffusion.

According to Fick's Law of Diffusion, Which of the Following