Jan042012

POSTED AT 12:39 PM


1. e. Students know the role of the endoplasmic reticulum and Golgi apparatus in the secretion of proteins.

There are two types—rough and smooth—of endoplasmic reticulum (ER), both of which are systems of folded sacs and interconnected channels. Rough ER synthesizes proteins, and smooth ER modifies or detoxifies lipids. Rough ER produces new proteins, including membrane proteins. The proteins to be exported from the cell are moved to the Golgi apparatus for modification, packaged in vesicles, and transported to the plasma membrane for secretion.

systems-groups of things working together
interconnected-connected to each other "inside"
synthesizes-to put together smaller things 
exported- moved out of
modification- changes, fixes
endoplasmic reticulum (ER)- a membrane connected to the nuclear membrane that is the site for protein synthesis
rough endoplasmic reticulum- the section of ER that is covered in ribosomes
smooth endoplasmic reticulum- the other half of the ER missing ribosomes, modifies and makes lipids
proteins- chemicals made by cells
golgi apparatus- membrane organelle that isresponsible for packaging the proteins that will leave the cell.
vesicles- bubbles of fat that carry proteins around the cell, coming off the smooth ER or golgi apparatus
plasma membrane- the “skin" of the cell, made of lipids, same as cell membrane

 

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