Question

why do we call plasma membrane as a selectively permeable membrane?....
guyss plzz answer​

Answer 1

We call plasma membrane as selectively permeable due to the following reasons:

Explanation:

• Plasma membrane is made up of phospholipid bilayer which selectively allows materials to enter inside or outside the cell.

• Plasma membrane is called selectively permeable as it allows specific entry of materials inside the cell.

• Small molecules can easily pass through the plasma membrane.

• For passing of large molecules, carrier molecules (carrier proteins) are required along with energy in the form of ATP.

Answer 2

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. ... If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.