Question

why is the plasma membrane called a selectively permeable membrane???​

Answer 1

$\Large {\mathfrak {\underline {\underline {Answer:-}}}}$

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The Plasma Membrane is a Selectively Permeable Membrane as it only allows Entry and Exit of Some Selected Molecules into and out of the Cells. It also Prevents Movement of Some Other Materials, therefore the Plasma Membrane is called a Selectively Permeable Membrane.


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Answer 2

$\mathfrak{Answer :-}$

Plasma Membrane is called as selectively permeable Membrane because it allows the entry of only required or selected substances / material in the cell.