In patient dialysis, what is the “membrane” and what is the “beaker”?

my teacher gave us a hint but i still don’t get it. plz someone help.

Hint: patient blood is running through a tube made of semi-permeable material. The tube is circulated through a machine containing a dialysate solution of specific components very similar to those in blood acting as a filter

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users