论文部分内容阅读
一、甲状腺激素 1.碘的代谢: 碘与甲状腺的生理有特殊的关系。碘是甲状腺激素的重要组成成分,一般膳食中无机碘化物的含量为100～200微克,包含在粮食和蔬菜中,此外来源为碘盐。由食物进入胃肠道中的碘是无机碘化物。甲状腺细胞蛋白质有吸附和浓集碘化物的能力,碘化物进入甲状腺细胞后即为细胞内的蛋白质所吸附,碘化物被氧化为碘分子(2I~-→I_2+2e)以后与酪氨酸结合。甲状腺制造甲状腺激素所需要的碘除来源于食物外,还有内源性的碘,即甲状腺激素经代谢以后释放出的
First, thyroid hormone 1. Iodine metabolism: iodine and thyroid physiology have a special relationship. Iodine is an important component of thyroid hormones, the general dietary inorganic iodide content of 100 to 200 micrograms, is included in food and vegetables, in addition to the source of iodized salt. The iodine that enters the gastrointestinal tract from food is inorganic iodide. Thyroid cell proteins have the ability to adsorb and concentrate iodide, which is adsorbed by intracellular proteins when iodide enters the thyroid cells. The iodide is oxidized to iodine molecules (2I- → I_2 + 2e) and then bound to tyrosine . Thyroid production of thyroid hormones needed in addition to iodine from food, as well as endogenous iodine, which is released after thyroid hormone metabolism