GENERAL HISTOLOGY

Detailed explanation-1: -The plasma membrane is called as selectively permeable membrane because it regulates the movement of substances in and out of the cell. It means that the plasma membrane allows some material to pass through it while at the same time it blocks other material from entering through it.

Detailed explanation-2: -The plasma membrane is selectively permeable because it allows entry of certain substances, exit of some substances while preventing passage to remaining substances.

Detailed explanation-3: –The currently accepted structure of the plasma membrane is the Singer and Nicolson Model which is also known as the Fluid Mosaic Model.-This model states that the components of the membrane are free to move to give the membrane a fluid-like nature.

Detailed explanation-4: -The cell membrane is a very thin layer of protein and fat. It allows only selective substances to pass through it, hence, it is called a selectively permeable membrane.