Question

multiple choice question
if the concentration of solute drops, how does the rate of facilitated diffusion change?
it stays the same
it speeds up
it slows down

Explanation:

Facilitated diffusion depends on the concentration gradient (and carrier proteins). A drop in solute concentration reduces the gradient, so the rate of facilitated diffusion (which relies on this gradient for driving the transport, along with carrier proteins) will decrease.

Answer:

C. It slows down