Endoplasmic Reticulum Flashcards
What does it surround?
The nucleus
What does it store?
Calcium
Essential component in what?
The production of lipids and steroids
What does it play a large role in?
Protein synthesis
Why does it play a large role in protein synthesis?
Due to the number of ribosomes
What makes up the ER?
Sheets and tubules
What are the sheets and tubules made of?
Phospholipid bilayers
What is the definition of the endoplasmic reticulum?
A network of membrane enclosed tubules and sacs (cisternae) that extend from the nuclea membrane throughout the cytoplasm
What are cisternae?
The layers of the endoplasmic reticulum- like flattened sacs
How is the rough ER rough?
Due to the ribosomes on the surface
What is the function of the rough ER?
Provides a large SA for the synthesis of proteins and glycoproteins
Provides a pathway for the transport of materials (especially proteins) throughout the cell
What is the large SA of the rough ER due to?
The tubules and flattened discs of membranes with ribosomes
What will happen to proteins and glycoproteins?
They will be embedded in membranes or transported out of the cell
How does the smooth ER get its smooth appearance?
Due to the lack of ribosomes on its surface
Functions of the smooth ER?
Synthesise, store and transport lipids throughout the cell
Synthesise, store and transport carbohydrates
