The rate of facilitated diffusion of a molecule into a cell depends on several factors.
While the transport proteins are not fully in use, explain how increasing the concentration difference across the membrane affects the rate of facilitated diffusion.
[2]
At very high concentration differences, increasing the concentration further has no effect on the rate. Explain why.
[2]
Suggest one way a cell could increase its maximum rate of facilitated diffusion.
[1]