Respuesta :
Insulin is a protein hormone secreted by the β-cells of islets of Langerhans in the pancreas. It has an important effect on the metabolism of carbohydrates, lipids and proteins by promoting the absorption of glucose present in the blood by fat cells, liver cells and those of skeletal muscles.
Insulins reduce blood sugar by a double action:
- by stimulating the peripheral uptake of glucose, in particular by skeletal muscle (by promoting the synthesis of glucogen) and adipose tissue (by promoting the synthesis of lipids).
- by inhibiting the hepatic production of glucose. This shows that the action of insulin on the hepatocytes is different from that of other cells.
To explain these differences, we must address notions of genetics, and more specifically epigenetics: All these cells have the same genome (identical DNA), but the expression of the latter in the different cells are very different. For example, for adipocytes, the expression of the enzymes involved in lipogenesis is favored, whereas the expression of the enzymes of glucogenogenesis is favored in the muscle cells, and in the liver there is a genetic overexpression of the enzymes of neoglucogenesis.
The uptake of insulin is different in different tissues. For example, the amount of insulin taken up by adipose tissue is different from that of a muscle cell.
Further Explanation:
Insulin is a kind of hormone in the body that is produced by the pancreatic cell. It increases the rate of absorption glucose in the body and maintains the level of glucose in the body. When there is any disturbance in this hormone. Then this can cause several health and body dysfunctions. Diabetes is a kind of disease which is developed when the level of glucose is elevated in blood than the normal level. Insulins reduce blood sugar by a double action:
• By stimulating the peripheral uptake of glucose, in particular by skeletal muscle (by promoting the synthesis of glycogen) and adipose tissue (by promoting the synthesis of lipids).
• By inhibiting the hepatic production of glucose. This shows that the action of insulin on the hepatocytes is different from that of other cells
All cells have the same genome, but the expression of the latter in the different cells are quite different. For example, for adipocytes, the expression of the enzymes involved in lipogenesis is favored, whereas the expression of the enzymes of gluconeogenesis is favored in the muscle cells, and in the liver, there is a genetic overexpression of the enzymes of gluconeogenesis.
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Answer Details:
Grade: High school
Subject: Health
Topic: Insulin
Keywords:
Insulin, diabetes, receptor, glucose, level, activated, feedback, concentration, health disease, cell, binding, kinase, effect, hormone, diabetes.
