Plasma Membrane – Location, Structure Functions -Class 9

What is Plasma membrane or Cell Membrane?

Plasma membrane is the outermost living, thin and delicate covering of the cell. It separates the contents of the cell from its external environment.

Plasma Membrane – Diagram

What is plasma membrane made up of?

Plasma membrane is made up of lipids (phospholipid) and proteins. It provides flexibility to plasma membrane.

The composition of plasma membrane helps it to engulf food and other materials from the external environment. It also makes plasma membrane selectively permeable, semipermeable, partially permeable and differentially permeable membrane.

Also Check – Golgi Body | Golgi Apparatus | Define ,Functions, Life of cell without Golgi Body

Why Plasma membrane is called selectively permeable membrane?

Plasma membrane is called selectively permeable membrane because it allows the entry and exit of some selective material in and out of the cell. It also prevents movement of some other materials.

What are the functions of plasma membrane?

Functions of plasma membrane are as follows-

  • It allows entry and exit of some selective material in and out of the cell.
  • It helps to maintain the shape of the cell. Read more …..

Also Check – What would happen if the plasma membrane ruptures or breakdown?

Also Check- Cell Structure and functions Class 8 NCERT Notes