GENERAL HISTOLOGY

Detailed explanation-1: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.

Detailed explanation-2: -The cell membrane is composed of carbohydrates, proteins, and lipids. The phospholipids form the lipid bilayer with hydrophilic glycerol and hydrophobic fatty acids. The carbohydrates include glycoproteins and glycolipids. They are the carbohydrates attached with either proteins or lipids.

Detailed explanation-3: -Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.