Lipid Synthesis
The smooth ER has functions in multiple metabolic processes, including synthesis of lipids and steroids, metabolism of carbohydrates, regulation of calcium concentration, drug detoxification, attachment of receptors on cell membrane proteins, and steroid metabolism. Smooth endoplasmic reticulum is found in a variety of cell types (both animal and plant), and it serves different functions in each. The Smooth ER also contains enzymes which converts into glucose. The Smooth ER has tubules and vesicles that branch forming a network.
The vesicles that leave the rough endoplasmic reticulum are transported to the cis face of the Golgi apparatus, where they fuse with the Golgi membrane and empty their contents into the lumen. Once inside the lumen, the molecules are modified, then sorted for transport to their next destinations.
The Golgi apparatus, then sorts the vesicles for their journey so on.
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