Organelles- Endoplasmic Reticulum

What are endoplasmic reticulum?

Network of flattened sacs and tubules

There are ______ endoplasmic reticulum and _______ endoplasmic reticulum.

There are rough endoplasmic reticulum and smooth endoplasmic reticulum.

Rough endoplasmic reticulum are

flattened sacs with ribosomes

Rough ER involves

Protein synthesis and the synthesized proteins can be:

• Secreted from cells (casein)

• Inserted into plasma membrane ( aquaporins)

• Used within the cell (lysozymes)

Smooth endoplasmic Reticulum

Is a series of tubules without ribosomes

Smooth Endoplasmic Reticulum Main functions

Synthesizing triglycerides and steroids, like testosterone.

Storing calcium ions in skeletal muscle cells.

Smooth Endoplasmic Reticulum Main function in liver cells

contains enzymes that help detoxify harmful substances and release glucose into the blood stream.