Sun Tanning

Essay specific features

 

Issue:

Miscellaneous

 

Written by:

Nathan M

 

Date added:

January 2, 2013

 

Level:

University

 

Grade:

A

 

No of pages / words:

11 / 3056

 

Was viewed:

7362 times

 

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Essay content:

Melanogenesis leads to delayed tanning. It first becomes visible about 72 hours after exposure.[1] The tan that is created by an increased melanogenesis lasts much longer than the one that is caused by oxidation of existing melanin. Darkening of the skin is caused by an increased release of the pigment melanin into the skin's cells after exposure to ultraviolet radiation...
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Melanin is produced by cells called melanocytes and protects the body from direct and indirect DNA damage absorbing an excess of solar radiation, which can be harmful. Depending on genetics, some people can darken quickly and deeply whereas others do not darken much at all. The ultraviolet frequencies responsible for tanning are often divided into the UVA (315 to 400nm wavelength) and UVB (280 to 315nm wavelength) ranges...
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