https://padlet.com/lunaangeline17/mivnw8e4wnpi Made with an aura of mystery en-us 2016-09-08 13:09:09 UTC 2026-01-04 10:36:38 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/File.png https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122560045 The closer people are to the equator, the darker their skin pigment is and vice versa because the closer you are to the equator, the hotter it is and the darker skin becomes because of all the melanin that is produced. Melanin, the skin's brown pigment, is a natural sunscreen that protects tropical peoples from the many harmful effects of ultraviolet (UV) rays. As people moved to areas farther from the equator with lower UV levels, natural selection favored lighter skin which allowed UV rays to activate and produce  vitamin D.

Source: http://humanorigins.si.edu/evidence/genetics/human-skin-color-variation/modern-human-diversity-skin-color]]> 2016-09-08 18:28:03 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122560045 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122560495 Taylor Lee Q1 & Q3
Angeline Luna Q4 &Q6
Katherine Fennelly Q5 & Q7


]]> 2016-09-08 18:29:10 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122560495 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122627803 Vitamin D helps maintain healthy bones and teeth and it helps protect against multiple diseases like type 1 diabetes. If you are vitamin D deficient then you would have problems like increased blood pressure.

Source: m.webmd.com]]> 2016-09-09 01:37:19 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122627803 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122628474 The darker the skin the more melanin it has which mean the darker skin will have more protection against skin cancer then a person with lighter skin.

Source: notes]]> 2016-09-09 01:43:49 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122628474 lunaangeline17 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122666912 The way that  vitamin D is synthesized starts with the molecules in your skin. These molecules turn into vitamin D when it comes in contact with UV light. It then travels through your bloodstream to your liver and kidneys where it becomes calcitriol.

Source: EDpuzzle vidde]]> 2016-09-09 08:42:26 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122666912 lunaangeline17 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122668126 There is a correlation between vitamin D deficiency and the amount of melanin you have in your skin. If you have a lot of melanin in your skin, (Dark-skinned) then you're cell are well protected. However,  due to the amount of melanin, your body can not make vitamin D from sunlight.

Source: http://articles.chicagotribune.com/2011-10-26/news/ct-x-1026-health-briefs-20111026_1_vitamin-d-deficiency-skin-sun-exposure]]> 2016-09-09 08:50:37 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122668126 lunaangeline17 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122693329 The layers of the epidermis are (from superficial to deep):
1. Stratum Corneum, dead, horny layers of the skin
2. Stratum Lucidum; only in thicker layers of skin like the palm and heels
3. Stratum granulosum; granules 
4. Stratum spinosum; location of keratinocytes 
5. Stratum basale; actively mitotic stem cells, as they age they become part of the superficial layers. 

Source: Podko notes]]> 2016-09-09 11:32:05 UTC https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122693329 https://padlet.com/lunaangeline17/mivnw8e4wnpi/wish/122716536 Melanin is located in the epidermis. It is the only skin pigment that is actually made in the skin by the melanocytes.  
Keratin is a fibrous protein that gives it protective properties and is made by the keratinocytes. Comes from the name kera which is Greek for horn. 

Source: Podko notes 


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