Thanks for stopping by
this is 2 Minute Classroom and today we're talking about the smooth endoplasmic reticulum
also known as the smooth ER
The smooth ER is a network of tubular 
membranous structures in eukaryotic cells
It is continuous with the rough ER but is not studded with ribosomes
hence it's smooth name and appearance
Although it is in close proximity and name to the rough ER
the smooth ER has very different but equally important functions
these functions vary by cell type but
 include some of the following
the synthesis of cholesterol and certain
 steroids in the adrenal glands
Involvement in carbohydrate and lipid synthesis,
and these lipids are also used to synthesize phospholipids for the cell membrane
The smooth ER has a major role in detoxification
and is abundant in the liver where it detoxifies the body from drugs alcohol and general metabolic wastes
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In skeletal muscle cells
the smooth. ER has a special role.
In fact, it is so special It gets a different name
the sarcoplasmic reticulum
it is critical in the storage and release of calcium ions involved in muscle contraction
And although the smooth ER isn't involved in protein synthesis
It does play an important role in 
the transport of proteins
If you have a test coming up, you should check out this playlist
or you can watch more videos 
about cells like these ones
Thanks for watching and I'll catch you next time
