Question

What is plasma membrane ?

Answer 1

Definition.

1. The plasma membrane is the outermost layer in cells. It separates the content of cells from their external environment.

Structure.

1. It is a phospholipid bilayer with the tails of the lipids present in the center and the head being at the ends.
2. The membrane is quite fluid and is represented by the fluid mosaic model.

Function.

1 . It gives protection to the cell against toxic substances.

2. It allows the specific movement of molecules such as nutrients, and ions.

3. It maintains cell to cell communication.