https://padlet.com/nathan_klaylor/i03d9ciyud4r Made with a dash of wit en-us 2016-09-08 17:43:47 UTC 2026-02-25 22:14:10 UTC hello@padlet.com autumnfrommer https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122627738 Stratum Corneum: 20-30 dead, horny layers
Stratum Lucidum: Only in thicker layers of skin
Stratum Granysoum
Stratum Spinosum: Most layers, Location of keratinocyte
Stratum Basale: Actively mitotic stem cells; as cells age they become part of superficial layers

Info from class notes

]]> 2016-09-09 01:36:34 UTC https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122627738 nathan_klaylor https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122698719 Vitamin D is mainly taken from exposure to sunlight, and is important to external proliferation (developing new cells) and differentiation (giving cell specific function. Vitamin D research has also shown that it may have a role in prevention of many diseases, including cancer and diabetes. A vitamin D deficiency can cause numerous diseases, such as rickets, which causes muscle retardation and deformities in the body.

http://lpi.oregonstate.edu/mic/micronutrients-health/skin-health/nutrient-index/vitamin-D

Holick MF. Resurrection of vitamin D deficiency and rickets. J Clin Invest. 2006;116(8):2062-2072.  (PubMed)

Melamed ML, Michos ED, Post W, Astor B. 25-hydroxyvitamin D levels and the risk of mortality in the general population. Arch Intern Med. 2008;168:1629–37. [PubMed]]]> 2016-09-09 12:02:54 UTC https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122698719 nathan_klaylor https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122701844 It was found that people with darker skin tones have melanin which limits how many ultraviolet light is absorbed into the skin. Since ultraviolet rays are crucial to the production of vitamin D in the skin, those with darker melanin are more likey to suffer from vitamin D deficiency.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3356951/#!po=5.10204

Rostand SG. Ultraviolet light may contribute to geographic and racial blood pressure differences. Hypertension.1997;30:150–6. [PubMed]

Clemens TL, Henderson SL, Adams JS, Holick MF. Increased skin pigment reduces the capacity of skin to synthesise vitamin D3. Lancet.1982;1:74–6. [PubMed]]]> 2016-09-09 12:20:00 UTC https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122701844 holydinosaurjuice https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122893496 3. On the equator, there solar radiation is more intense which causes for melanin to be darker. The further away you are from the equator, the lighter your melanin will be. This is all because of the protection needed against the solar radiation.

source : http://anthro.palomar.edu/adapt/adapt_4.htm

& edpuzzle video]]> 2016-09-09 22:13:48 UTC https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122893496 holydinosaurjuice https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122893824 4. The skin cells contain a molecule that converts to vitamin D when it comes in contact with UV light. Then, the vitamin goes into the bloodstream into your liver and kidneys and then becomes Calcitriol and then goes into the bones. 

source: edpuzzle ]]> 2016-09-09 22:20:19 UTC https://padlet.com/nathan_klaylor/i03d9ciyud4r/wish/122893824