Question

When molecules cannot move through a cell membrane passively, the cell uses a process called what?

Answer 1

It's actually called "active transport."

Step-by-step explanation:

The trick is in the question itself. When they can't move through a cell membrane PASSIVE-ly, the cell uses transport proteins to actively transport them.

Answer 2

I believe it is called Passive Transport, if I am not mistaken.

I hope this helps!