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Answers. Relevance. Rating Newest Oldest. Best Answer: The nuclear membrane is the same thing as the nuclear envelope. It keeps the contents of the nucleus separate from the rest of the cell. The nuclear membrane does have pores that allow ribosomes and mRNA to leave the nucleus on their way to the cytoplasm.It's also interesting that the nuclear membrane is double-two membranes together, actually.Source(s):t keeps the contents of the nucleus separate from the rest of the cell. The nuclear membrane does have pores that allow ribosomes and mRNA to leave the nucleus on their way to the cytoplasm. It's also interesting that the nuclear membrane is double-two membranes together, actually. Source(s):
Cell Membrane Function. The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out. It also serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others. Thus the cell membrane also serves to help support the cell and help maintain its shape.