AP BIOLOGY

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.

Detailed explanation-2: -Every cell in the body is enclosed by a cell (Plasma) membrane. The cell membrane separates the material outside the cell, extracellular, from the material inside the cell, intracellular.

Detailed explanation-3: -: something that indicates or fixes a limit or extent. Those two trees mark the boundary of our property. the mountain range that forms the country’s northern boundary.

Detailed explanation-4: -The plasma membrane of the cell defines the cell boundary.

Detailed explanation-5: -Cytoplasm forms the outer boundary of a cell and controls material moving in and out of the cell.