insulin(胰島素)及glucagon(昇糖素)的差別

有人可以給我比較詳細的說明 insulin(胰島素)及glucagon(昇糖素)的差別嗎??

3 個解答

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  • kaolp
    Lv 5
    1 0 年前
    最佳解答

    Insulin and glucagon are hormones secreted by islet cells within the pancreas (more about islet cells of the pancreas). They are both secreted in response to blood sugar levels, but in opposite fashion!

    Insulin is normally secreted by the beta cells (a type of islet cells) of the pancreas. The stimulus for insulin secretion is a HIGH blood glucose...its as simple as that! Although there is always a low level of insulin secreted by the pancreas, the amount secreted into the blood increases as the blood glucose rises. Similarly, as blood glucose falls, the amount of insulin secreted by the pancreatic islets goes down. As can be seen in the picture, insulin has an effect on a number of cells, including muscle, red blood cells, and fat cells (shown in the picture). In response to insulin, these cells absorb glucose out of the blood, having the net effect of lowering the high blood glucose levels into the normal range.

    Glucagon is secreted by the alpha cells of the pancreatic islets in much the same manner as insulin...except in the opposite direction. If blood glucose is high, then no glucagon is secreted. When blood glucose goes LOW, however, (such as between meals, and during exercise), more and more glucagon is secreted. Like insulin, glucagon has an effect on many cells of the body, but most notably the liver. The effect of glucagon is to make the liver release the glucose it has stored in its cells into the blood stream, with the net effect of increasing blood glucose. Glucagon also induces the liver (and some other cells such as muscle) to make glucose out of building blocks obtained from other nutrients found in the body (e.g., protein).

    http://tw.knowledge.yahoo.com/question/?qid=110505...

  • 1 0 年前

    ●insulin(胰島素)

    他的作用機轉是→藉活化運輸葡萄糖通過細胞膜之攜帶系統,便利紋狀肌肉細胞和脂肪組織吸收葡萄糖。增加酶的活性刺激肌肉和肝臟之合成和抑制糖質新生,增進三酸甘油脂形成和延緩游離脂肪酸由脂肪組織中釋出。便利胺基酸與肌肉蛋白質結合促進蛋白質合成。恢復葡萄糖利用之效力降低高血糖,減少糖尿和預防糖尿病性酸中毒和昏迷。

    ●glucagon(昇糖素)

    作用機轉→促進肝糖分解及糖質新生,刺激腺苷酸環酶產生增加環狀單磷酸腺苷酸,此與複雜的酵素活動有關,因而增加糖漿葡萄糖濃度,對平滑肌組織產生鬆弛作用及影響肌肉收縮力的心肌效應。肝臟貯存肝糖血糖激素發揮抗血糖過少作用之所需。

    參考資料: 自己的課本
  • 1 0 年前

    胰島素是降血糖的,糖尿病患者需要依賴胰島素來調降血糖

    升糖素是升高血糖的,血糖低於一定值會調節血糖

    應該是這樣 .... >"<

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