EVERYDAY SCIENCE

Detailed explanation-1: -Definition. 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 wall is the structure that surrounds the cell membrane and gives support to the cell. The cell wall provides tensile strength as well as protection to the cell.

Detailed explanation-3: -In its role as gatekeeper, the cell membrane regulates molecular traffic into and out of the cell via specialized membrane proteins. Ion channels, proteins that span the cell membrane, are a prominent example.