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人为什么会晒黑呢

更新时间: 2020-10-13 00:00:00     

当热辐射或太阳光照射皮肤时,激发并活化了位于基底层内的黑色素细胞,它们以10比1的比例存在于基底细胞内,此细胞具有树枝样的外形,穿梭在表皮细胞内。黑色素细胞中含有色素颗粒,在粗内质网合成黑色素体,将催化酪氨酸进行系列反映,并生成黑色素蛋白,同时酪氨酸酶将失去活性,并担任运输工作,将其转移至角质细胞。黑色素蛋白转移入角质细胞越多,肤色越深。

关键词: 人为 什么 会晒

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