smooth ER and rough ER function please??
Answers
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Rough ER is concerned with the transport of proteins which are synthesized by ribosomes on their surfaces.
Smooth ER of hepatic (liver cells) cells of vertebrates helps in detoxification.
It metabolises various toxic and poisonous substances such as drugs, aspirin, insecticides, petroleum products and other pollutants.
These toxic substances usually enter the body through food, air or water.
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Answer:
Smooth ER functions are,
Synthesize lipids. Including,
Oils
New membrane phospholipids
Steroids – Sex hormones of vertebrates (Eg. Estrogen) and various steroid hormones secreted by the adrenal glands (Eg. Cortisol, Aldosterone). Interstitial cells in the testis and follicular cells in the ovary produce sex hormones, hence those cells have a much larger amount of smooth ER within them.
Metabolism of carbohydrates – Eg. Glycogen metabolism
Transport lipids and steroids within the cell.
Produce transmission vesicles for transport.
Detoxification of drugs and poisons.- Especially in liver cells (hepatocytes) have abundant Smooth ER. Detoxification usually involves adding -OH (hydroxyl groups) to drug molecules, That makes the drug molecules more soluble and easier to flush from the body.
Stores Calcium ions (Ca2+) – In muscle cells, a specialized type of smooth ER (Sarcoplasmic Reticulum) stores and delivers the calcium ions required for muscle contraction.
Contain enzymes which are involved in Gluconeogenesis. – Eg. glucose-6-phosphatase.
Explanation: