Which statements accurately describe the characteristics of the cell membrane?

If this is the question on edge2020 the correct answers are:

-The cell membrane’s protein channels only let certain molecules pass through.

-The cell membrane has protein channels that are partly inside and partly outside the cell.        

-   The cell membrane is a double layer of phosphate molecules and lipids.

Explanation:

I HOPE THIS HELPS!!

the answer is b. 0; 4

answer; i believe that the correct answer is (lung);