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QUESTION

HAIR

Explain what causes hair to lose its color, that is, go gray as we age.

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ANSWER

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**** ***** ** *** pigmentation ** **** follicles due ** two ***** of ******** eumelanin *** pheomelanin ********* if **** eumelanin ** ******* *** ***** ** *** **** ** darker; if less ********* ** ******* *** **** ** ******* ****** ** ******* **** **** **** ******* * ************** **** color ** ****** *** ** ** ******** ** **** hair follicles ** more than *** ***** ** *** same ****** The ****** and *********** of various ******* ***** are ********** ****** ** *** ***** *********** start ***** ********* **** ****** *** birth *** their ******** ********* with *** *** ********* ********** ******** decreases ****** every 10 ***** after *** ** **** ********* have a ****************** clock’ **** ********* **** ************ **** *** *** ***** ********* it **** aging **** ******** *********** ***** which is caused by ***** causes **** ** lose its *****

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