Question

list main functions of plasma membrane

Answer 1

Plasma membrane separates the components of the cell from its outside environment.
It regulates what enters and exits the cell.
It allows only selected substances into the cell and keeps others out.
Plasma membrane has a major role in protecting the integrity of the interior of the cell.
Plasma membrane serves as a base of attachment for the cytoskeleton in some organisms and cell walls in other organisms. Thus it supports the cell and helps in maintaining the shape of the cell.
Plasma membrane is composed of lipids and proteins. Lipids give flexibility to membranes and proteins maintain the chemical climate of the cell and help in transfer of molecules across the membrane.
The lipid bi layer is semi permeable, that is, it allows selected molecules to diffuse across the membrane.

Answer 2

Hey friend,
Here is your answer:

Functions of plasma membrane or cell membrane:

• It separates contents of the cell from its surroundings.

• It regulates the entry of certain solutes and ions.

• It maintains shape of the cell.

• It hold the contents of the cell.

• It protects the cell by acting as a semi permeable membrane.

Hope it helps u.