Final answer:
The smooth endoplasmic reticulum (SER) is where lipids, triglycerides, and steroids are synthesized, as well as where calcium is stored within the cell.
Step-by-step explanation:
The smooth endoplasmic reticulum (SER) is the site where lipids, triglycerides, and steroids are synthesized, as well as where calcium is stored within the cell. It plays a role in lipid biosynthesis, carbohydrate metabolism, and detoxification of toxic compounds. The rough endoplasmic reticulum (RER) contains membrane-bound 80S ribosomes that synthesize proteins destined for the cell membrane.