15 Flashcards
1
Q
Endoplasmic Reticulum (ER)
A
Is a convoluted membranous structure.
2
Q
Where does the ER extend from and to?
A
It extends from the surface of the nucleus throughout most of the cytoplasm.
3
Q
What does the ER enclose?
A
It encloses a series of intercommunicating channels called cisternae.
4
Q
How does the surface area of the ER compare to the plasma membrane?
A
Its membrane surface is up to 30 times that of the plasma membrane.
5
Q
What is the ER a major site for?
A
It is a major site for vital cellular activities
6
Q
What distinguishes rough ER from smooth ER?
A
The presence of numerous polyribosomes attached to the membrane of the rough ER.
