How does the cell membrane control what comes in and out of the cell?

The 'cell membrane' also known as the plasma membrane or cytoplasmic membrane is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells

Explanation:

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i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.