Final answer:
Smooth endoplasmic reticulum is prominent in cells involved in lipid synthesis, detoxification, and calcium regulation such as liver cells, steroid hormone-producing cells, and muscle cells.
Explanation:
Smooth endoplasmic reticulum (SER) is abundant in cells that synthesize lipids, phospholipids, steroids, and are involved in detoxification and storage functions. Cells like the liver cells and those producing steroid hormones have a significant amount of smooth endoplasmic reticulum. In muscle cells, a specialized form known as sarcoplasmic reticulum regulates calcium ion concentration.
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