49. Intext question IV

 

A biological membrane that joins the interior of the cell from the external environmentchemical membrane that connects the interior of the cell from the external environmentbiological membrane that separates the interior of the cell from the external environment is the cell membrane, also known as the plasma membrane. Because it regulates how substances enter the cellenter and exits the cellexits the cell, the plasma membrane is referred to as a permeable membraneselectively permeable membrane. It shows that some materials can pass through the plasma membrane while others cannot because the membrane prevents them.