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第一节甲状腺的激素一、甲状腺的激素种类甲状腺激素主要包括甲状腺素(T_4)和三碘甲腺原氨酸(T_3)。在正常甲状腺中,T_4的含量占绝大多数,而T_3的含量则很少。在甲状腺功能亢进时,腺体内产生的T_3的量增加很多。现已知道,T_3是机体内起主要作用的甲状腺激素。二、甲状腺激素的合成合成甲状腺激素的主要原料是甲状腺球蛋白和碘,甲状腺球蛋白在腺泡细胞内合成,然后运送到腺泡腔内贮存。碘有两种来源,体内甲状腺素代谢过程中脱下的碘可以由甲状腺回收利用,但由食物供碘仍是主要的。正常人每天从食物中摄碘最低需要为50μg。甲状腺具有很强的选择性摄取、浓缩、转
First, the thyroid hormone First, the thyroid hormone types Thyroid hormones include thyroxine (T_4) and triiodothyronine (T_3). In normal thyroid, the content of T_4 accounted for the vast majority, while the content of T_3 is very small. In hyperthyroidism, the amount of T_3 produced in the gland increases considerably. It is now known that T_3 is the major thyroid hormone in the body. Second, the synthesis of thyroid hormone Synthesis of thyroid hormone is the main raw material of thyroglobulin and iodine, thyroglobulin synthesis in the acinar cells, and then transported to the acinar cavity storage. There are two sources of iodine, thyroid hormone metabolism in the process of taking off the thyroid gland can be recycled, but iodine is still the main food. Normal daily intake of iodine from food needs a minimum of 50μg. Thyroid has a strong selective uptake, concentration, turn