The Endoplasmic Recticulum (ER) is a network of tubes and flattened sacs made of membranes. The ER has many
impotant functions such as the division of the cytoplasm outside of the ER and the cytoplasm inside the sacs and channels
of the ER. It can isolate disruptive material that might affect the cell in one way or another and it provides a passage to
move materials from the nucelus to the cytoplasm and to the plasma membrane.
The Two Types of ER
Rough ER- has ribosomes stuck to the surface of it causing the surface to appear rough and bumpy. They make
and export the proteins because of the ribosomes on them and the passage way they have. Not all ribosomes are on the
ER. The ribosomes that are attached to the ER all make proteins that goes through the ER channels and made into vesicles.
Smooth ER- Is smooth because there are no ribosomes stuck to it. This is the site of non-protein synthesis
such as lipids, hormones, or carbohydrates.
Is an organelle that is a flattened stack of tubular membranes that modifies the proteins. The ER
gives the Golgi appartus the proteins that were made fron the ribosomes on it. The Golgi's job is to then sort out the
proteins and make them into packages of membrane bound structures called vesicles. After being packed into vesicles
they are shipped into their appropiate destination.
Shipping Out Proteins
The ER recieves the proteins from the rough part of the ER and uses its passage ways to ship it to the Golgi
apparatus. There the proteins are sorted out and made into packages called the vesicles and are shipped to the appropiate
destination. In a way the golgi apparatus is like the post office because they have to sort of the packages that were
given to them by the people (or in the cell's case the ER). After recieving the packages, they have to rearrange them and
make sure that the letters get to their appropiate address or destination.