头发真的能在一夜间变白么?什么原理?

2025-03-16 18:28:16
推荐回答(1个)
回答1:

人一旦情绪大幅度地受到波动,会导致身体机能失去平衡,头部血液从而导致供血不足,会出现头发部分脱落或变白的现象。 

  1. 头发的中心是些方形的细胞;环绕这些方形细胞的,是些状似纺锤缍的角质细胞群,它们的体内,含着众多的黑素颗粒。头发的最外层,是通体透明的角质细胞,成鱼鳞状排列,它们不过起外套的作用罢了。 头发内所含的黑素,是带色的颗粒。它们由黑色细胞吸取一种名叫“酪氨酸”的蛋白质,经过酪氨酸霉的化学作用,几经变化,成为发褐黑色的粒子。头发内带着这种色素,根据色素的多寡、分布的不同,于是出现了形形色色的头发颜色。

  2. 若人的全身机能日趋衰退。黑素生成的功能,也不例外。据研究,老年人酪氨酸霉,虽还照常出现,但它的活力,已经低下,不能旺盛地生产黑素。

  3. 此外,制造黑素的母机—三黑索细胞的减少,以及黑素颗粒的日渐消失,使乌黑的头发,成为灰白一片。如果等到黑素完全消失,或者在满含黑素的那些细胞体内,进来了一些空泡,那么,头发就整个变白,连灰色都消声匿迹、不见踪影了 。

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