What controls what goes in and out of a cell?

What controls what goes in and out of a cell?

Correct Answer: the plasma membrane
the mitochondria
the cilia
the nucleus

Explanation: The function of the plasma membrane is to control what goes in and out of the cell. Some molecules can go through the cell membrane to enter and leave the cell, but some cannot. The cell is therefore not completely permeable. "Permeable" means that anything can cross a barrier. An open door is completely permeable to anything that wants to enter or exit through the door. The plasma membrane is semipermeable , meaning that some things can enter the cell, and some things cannot.

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