-smooth endoplasmic reticulum because it doesn't have attached ribosomes

- human livers have large amounts of smooth ER

-certain enzymes help process harmful substances such as drugs and detoxification

- Aside from detoxifying harmful substances smooth ER also detoxifies organic chemicals making them into safe soluble products

- Smooth ER also functions to store calcium ions and the calcium ions are released into the interior of the ER in muscle cells

- if the nerve signal stimulates muscles cells then calcium ions go into the cytoplasmic fluid and result in the contraction of muscle cells

- involved in the creation and storing of steroids hormones and lipids

Smooth Endoplasmic Reticulum