A polypeptide hormone secreted by the islets of Langerhans and functioning in the regulation of the metabolism of carbohydrates and fats, especially the conversion of glucose to glycogen, which lowers the blood glucose level.

• 胰岛素一种胰岛分泌的多肽激素，作用于碳水化合物和脂肪新陈代谢的调节系统，特别作用于葡萄糖向降低血糖的糖原转化的过程