Answer:
Make lipids.
Step-by-step explanation:
The smooth endoplasmic reticulum is the type of endoplasmic reticulum that does not have ribosomes studded at its surface. Due to the absence of ribosomes, the surface of smooth endoplasmic reticulum appears smooth and hence, it is named "smooth endoplasmic reticulum".
The function of smooth endoplasmic reticulum is to serve as a site for lipid synthesis. For example, the phospholipids of the cell membrane are synthesized at the smooth endoplasmic reticulum.
The smooth endoplasmic reticulum is particularly abundant in some cell types to perform some specific functions. Smooth endoplasmic reticulum in liver cells serves to convert the stored glycogen into glucose so that the later can enter into the pathway of energy production.