What is the function of the cell membrane?

Answer: A. To control what enters and leaves the cell

The cell membrane (or plasma membrane) is a selectively permeable barrier that surrounds the cell. Its primary function is to regulate the passage of substances—such as nutrients, water, and waste products—into and out of the cell to maintain homeostasis, a stable internal environment. It consists of a phospholipid bilayer with embedded proteins that act as channels or pumps for specific molecules

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