Structure of a Cell - Endoplasmic Reticulum (ER)

Advertisement Remove all ads



Endoplasmic Reticulum:

  • The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. It looks like long tubules or round or oblong bags (vesicles).

  • There are two types of ER –

    • Rough endoplasmic reticulum (RER)

    • Smooth endoplasmic reticulum (SER).

  • RER has ribosomes attached to its surface which are sites of protein synthesis.

  • SER helps in the manufacture of fat molecules, or lipids, important for cell function.

  • Membrane biogenesis - Some of these proteins and lipids help in building the cell membrane. This process is known as membrane biogenesis.

  • It always forms a network system. It serves as serve as channels for the transport of materials (especially proteins) between various regions of the cytoplasm or between the cytoplasm and the nucleus.

  • The ER also functions as a cytoplasmic framework providing a surface for some of the biochemical activities of the cell. Eg. SER also helps in detoxification.

If you would like to contribute notes or other learning material, please submit them using the button below. | Endoplasmic Reticulum

Next video

Endoplasmic Reticulum [00:02:47]
Series: Endoplasmic Reticulum

Advertisement Remove all ads

View all notifications

      Forgot password?
View in app×