Answer:
c) It controls which substances enter and exit the cell
Explanation:
The plasma membrane is responsible for the selection of particles that enter and leave the cell in a selective process. It is composed of a bilayer of phospholipids and proteins that allow the passage of certain molecules respecting a concentration gradient and the necessities of the cell.
It is important to remember that phospholipids are composed of an hydrophilic head and a hydrophobic body and that the composition of the plasma membrane allows for a fluid movement and organization of the membrane in a fluid mosaic.
When the concentration gradient is not respected, and is necessary to go against it, the plasma membrane uses of a machinery of proteins and molecules to create the so called active transport where molecules are carried in or out of the cell against a concentration gradient or to carry big molecules into the cell or out of the cell.
Learn more about plasma membrane and phospholipids: https://brainly.com/question/48704570
