If a Molecule Crosses a Membrane and Is Quickly Removed

Multiple Choice

If a molecule crosses a membrane and is quickly removed from the area by the blood stream or some biological pathway, what effect does this have on its rate of diffusion?

A) Diffusion rate will not be affected.
B) Diffusion rate will increase.
C) Diffusion rate will remain constant.
D) Diffusion rate will progressively decrease until zero.
E) Diffusion rate will decrease.