For solutes that move by simple diffusion, which of the following does NOT affect the rate of simple diffusion across a membrane?
a) the membrane pore size
b) the potential energy of the solute
c) the size of the solute
d) the concentration of the solute

For solutes that move by simple diffusion,the following does NOT affect the rate of simple diffusion across a membrane:

A.  The membrane pore size

B. The potential energy of the solute.

Explanation:

The diffusion rate is the variation within the cell in the number of diffusing molecules. This is because the overall movement of diffusing molecules is based on the gradient of concentration. It direct towards the mechanism by which in a solution or across a semipermeable membrane, solutes are carried with a concentration gradient. If the molecules are small sufficient, this simple diffusion, between the individual phospholipids that make up the membrane, will occur across the cell membranes.

c it has to be i googled it