Question

The _____ is a selective barrier, regulating the passage of material into and out of the cell. the _____ is a selective barrier, regulating the passage of material into and out of the cell. plasma membrane nucleus lysosome chloroplast nuclear envelope

Answer 1

The answer is "plasma membrane". Protection of the cell is the chief function of this membrane, and it does so through the employment of selective permeability. The composition of the cell allows some ions and molecules to pass through, while rejecting the passage of others and thus controlling the inflows and outflows of the cell.