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A hepatocyte is a cell of the main parenchymal tissue of the liver. Hepatocytes make up 70-85% of the liver's mass.These cells are involved in: 1  Protein synthesis. 2  Protein storage. 3  Transformation of carbohydrates. 4  Synthesis of cholesterol, bile salts and phospholipids.he typical hepatocyte is cubical with sides of 20-30 Âµm, (in comparison, a human hair has a diameter of 17 to 180 Âµm). The typical volume of a hepatocyte is 3.4 x 10 â9 cm 3. Rough endoplasmic reticulum is abundant in hepatocytes, whereas most cells in the body have only small amounts.
Hepatocyte growth factor (HGF) is a key regulator of satellite cell activity. It has been shown to be the active factor in damaged muscle and may also be responsible for causing satellite cells to migrate to the damaged muscle area (Charge and Rudnicki 2004). Fibroblast growth factor (FGF) is another important growth factor in muscle repair following exercise.