What does the cell membrane do for the cell?

The cell membrane plays a crucial role in protecting the cell by acting as a selective barrier. It regulates what enters and exits the cell, thereby helping to maintain homeostasis. The membrane allows essential nutrients to enter while keeping harmful substances and pathogens out, thus shielding the cell from potentially dangerous conditions.

This protective function is vital for the survival and proper functioning of the cell, enabling it to thrive in a variety of environments. The structure of the cell membrane, which consists of a phospholipid bilayer embedded with proteins, supports its role in selective permeability and cell protection.