The correct answer as to which best describes the function of a cell membrane would be that the cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell. The correct option would be A.
The cell membrane primarily delimits the cell and act as an interface between the inner content of the cell and its surrounding.
The cell membrane is selectively permeable. Thus, it regulates the movement of materials between the cell's matrix and the surrounding.
Other functions of the cell membrane include:
- By regulating the movement of materials in and out of the cell, the cell membrane ensures that the optimal range of concentration of substances is maintained within the cell. In other words, it maintains homeostasis.
- By surrounding the cell, the plasma membrane becomes the first line of contact for anything that might want to harm the cell. Hence, it serves protective functions.
- By selectively allowing and influencing some materials to move out or inside the cell, the cell membrane plays an integral role in the transportation of materials.
More on the functions of the cell membrane can be found here: https://brainly.com/question/18447184
