(a) The ER is a winding network of thin membranous sacs found in close association with the cell nucleus. The smooth and rough endoplasmic reticula are very different in appearance and function (source: mouse tissue). (b) Rough ER is studded with numerous ribosomes, which are sites of protein synthesis (source: mouse tissue). EM × 110,000. (c) Smooth ER synthesizes phospholipids, steroid hormones, regulates the concentration of cellular Ca++, metabolizes some carbohydrates, and breaks down certain toxins (source: mouse tissue)
Cut Rita Zahara
“Endoplasmic Reticulum (ER),” Open Educational Resource (OER) , accessed December 3, 2022, http://oer.iain-padangsidimpuan.ac.id/items/show/954.