All Questions
Tagged with pigmentation skin
7 questions
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0
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Why does more melanin means harder vitamin D production if melanocytes lie deeper in the skin than keratinocytes?
From my Googling, I understand that keratinocytes are primarily responsible for generating vitamin D from UV rays, and melanocytes are for producing melanin to block UV rays. However in lots of skin ...
- 140
1
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2
answers
717
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Why do redheads tend to sunburn more easily?
Reading Marion Roach's book on redheads she mentions visiting Rees lab where he shines UV light on her skin. Apparently this is an ongoing experiment of his regarding the propensity of redheads to ...
- 151
-2
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1
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Why do we see black when we close our eyelids? [closed]
Why do we usually see black when we close our eyelids assuming there is no strong light source outside?
I realize we never really stop seeing as long as our eyes are healthy but based on assumption ...
- 315
3
votes
2
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29k
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How does a smoker's finger or mustache get yellowish by nicotine?
Tobacco use is the leading cause of preventable death around the world.$\ce{^1}$
The stain is considered as a "tell-tale" sign for identifying smokers. Multiple materials stated that it's due to tar ...
- 531
4
votes
1
answer
2k
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Skin color explanation?
I do not understand how skin color in humans work, even after taking a basic genetics course and reading some on wikipedia.
From what I understand, skin is color based on multiple genes that control ...
- 1,289
5
votes
1
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7k
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Is the Michael Jackson skin pigmentation disease realistic?
Quoting wikipedia:
Jackson's skin had been a medium-brown color for the entire duration
of his youth, but starting in the mid-1980s, it gradually grew paler.
The change gained widespread media ...
- 159
2
votes
2
answers
314
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Can the colour of skin change with age
Can the colour of skin change with age? Can a dark skinned person become fair or vice versa? Can Melanocyte production vary?
- 369