Kidney Dialysis Relies on Diffusion of Various Dissolved Waste Molecules

question 4

Multiple Choice

Kidney dialysis relies on diffusion of various dissolved waste molecules (solutes) across a non-living semipermeable membrane. If the concentration of solutes in the blood increases over time before dialysis is administered, what will happen to the rate of dialysis when it occurs?

• A) It will remain the same since there are no carrier molecules in a non-living membrane.
• B) The rate will slow down since the solute is more viscous.
• C) The rate will speed up since the concentration gradient is higher.
• D) It will remain the same since there is no active transport in a non-living membrane.
• E) The rate will depend on the amount of time given for diffusion to take place.

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