why is the plasma membrane called a selectively permeable
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plasma membrane is called a selectively permeable membrane as because it allow only selected substance to pass through it. it does not allow all substance to pass through it aur make movement in and out of the cell.
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The plasma membrane allows the entry and exit of some materials in and out of the cell. It prevents the movement of some other materials. Therefore, cell membrane is called a selectively preamble membrane.
More Information:-
Cell membrane or plasma membrane is the outer most covering of the cell that separates the contents of the cell from its external environment. It is present in both animal and plant cells.
Functions of cell membrane:
•It gives definite shape to the cell.
•It is selectively permeable membrane.
•It separates the contents of cell from its surrounding medium.
•It regulates the movement of ions in an out of the cell.
•It provides mechanical barrier for the protection of the internal contents of the cell.
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