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undergraduate thesis
Obojenost kože ljudi kao prilagodba na UV zračenje
Zagreb: University of Zagreb, Faculty of Science, 2014. urn:nbn:hr:217:296782
Sekelj, Maja
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

Cite this document

Sekelj, M. (2014). Obojenost kože ljudi kao prilagodba na UV zračenje (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:296782

Sekelj, Maja. "Obojenost kože ljudi kao prilagodba na UV zračenje." Undergraduate thesis, University of Zagreb, Faculty of Science, 2014. https://urn.nsk.hr/urn:nbn:hr:217:296782

Sekelj, Maja. "Obojenost kože ljudi kao prilagodba na UV zračenje." Undergraduate thesis, University of Zagreb, Faculty of Science, 2014. https://urn.nsk.hr/urn:nbn:hr:217:296782

Sekelj, M. (2014). 'Obojenost kože ljudi kao prilagodba na UV zračenje', Undergraduate thesis, University of Zagreb, Faculty of Science, accessed 04 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:296782

Sekelj M. Obojenost kože ljudi kao prilagodba na UV zračenje [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Science; 2014 [cited 2024 November 04] Available at: https://urn.nsk.hr/urn:nbn:hr:217:296782

M. Sekelj, "Obojenost kože ljudi kao prilagodba na UV zračenje", Undergraduate thesis, University of Zagreb, Faculty of Science, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:217:296782

Metadata
TitleObojenost kože ljudi kao prilagodba na UV zračenje
Title (english)Human skin pigmentation as an adaptation to UV radiation
AuthorMaja Sekelj
MentorAna Galov (mentor)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2014, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Pigmentacija ljudske kože nastala je kao rezultat prirodne selekcije koja se odvijala pod utjecajem dvaju čimbenika. U područjima visokog UV zračenja, blizu ekvatora, razvila se tamna pigmentacija kako bi se zaštitila folna kiselina, dok je do evolucije depigmentirane kože došlo u područjima s niskim UV zračenjem zbog potrebe održavanja proizvodnje vitamina D. Važnost očuvanja folne kiseline i sama proizvodnja vitamina D kako bi ljudsko tijelo normalno funkcioniralo je ogromna. Folna kiselina i vitamin D važni su za reproduktivni uspjeh. Između ekvatora i polova, između 23. i 46. stupnja geografske širine evoluirali su ljudi s konstitutivnom pigmentacijom koji mogu tamniti. Tamnjenje kože ili fakultativna pigmentacija je odličan evolucijski kompromis jer kada je intenzitet UVB zračenja niski, koža ostaje svjetlija da bi se mogao proizvoditi vitamin D u takvim uvjetima, a kako se poveća intenzitet UVB zračenja, ten postaje tamniji da bi se zaštitila folna kiselina od fotolize uzrokovane UV zračenjem. Pigmentacija ljudske kože predstavlja jedan od najboljih primjera evolucije prirodnom selekcijom te je savršen model za njeno učenje i razumijevanje.
Abstract (english)
Pigmentation of human skin is the result of natural selection, which took place under the influence of two factors. In areas of high UV radiation, near the equator, dark pigmentation has developed to protect folate, while the evolution of depigmented skin occured in areas with low UV radiation because of the need to maintain the production of vitamin D. The importance of preservation of folic acid and vitamin D production itself in the human body is huge. Between the equator and the poles, between 23 and 46 degrees of latitude, there evolved humans with constitutive pigmentation of tanable skin. Tanning or facultative pigmentation is a great evolutionary compromise because when the intensity of UVB radiation is low, the skin remains of lighter pigmentation so it could produce vitamin D under such conditions, and as intensity of UVB radiation is getting higher, tan is getting darker so it could protect folate acid from photolysis caused by UV radiation. Pigmentation of human skin is one of the best examples of evolution by natural selection and it is the perfect model for learning and understanding it.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:296782
Study programmeTitle: Molecular Biology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) molekularne biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) molekularne biologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2018-04-27 09:26:58