Zabayyana na mutum
 Zabayyana na mutum | |
|---|---|
| Bayanai | |
| Ƙaramin ɓangare na | Zabaya |
Zabayyana wani yanayi ne na haihuwa wanda ke bayyana a cikin mutane ta hanyar rashi ko cikakken rashi a cikin fata, gashi da idanu. Zabayyana yana hade da wasu lahani na hangen nesa, irin su photophobia, nystagmus, da amblyopia . Rashin launin fatar fata yana haifar da ƙarin kamuwa da kunar rana da kuma ciwon daji na fata. A lokuta da ba kasafai ba irin su Chédiak-Higashi ciwo, albinism na iya haɗawa da gazawa a cikin jigilar melanin granules. Wannan kuma yana shafar mahimman granules da ke cikin ƙwayoyin rigakafi, yana haifar da haɓakar kamuwa da cuta.[1]
Zabayyana yana samuwa ne daga gadon gadon halittu masu rarrafe kuma an san yana shafar dukkan kashin baya, har da mutane . Ya faru ne saboda rashi ko lahani na tyrosinase, wani enzyme mai dauke da jan karfe da ke cikin samar da melanin . Ba kamar mutane ba, sauran dabbobi suna da launuka masu yawa kuma saboda waɗannan, ana ɗaukar albinism a matsayin yanayin gado wanda ke nuna rashin samun melanin musamman, a idanu, fata, gashi, sikeli, gashin fuka-fuki ko cuticle.[2] Yayin da kwayar halittar da ke da cikakkiyar rashi na melanin ana kiranta albino, kwayar halittar da ke da karancin melanin ana kwatanta ta da leucistic ko albinoid.[3] Kalmar daga Latin albus, "farar fata".
Alamomi
[gyara sashe | gyara masomin]Akwai manyan nau'ikan zabayyana guda biyu: oculocutaneous, yana shafar idanu, fata da gashi, da ido yana shafar idanu kawai.
Akwai nau'ikan zabayyana na oculocutaneous daban-daban dangane da wane nau'in halittar da aka yi maye gurbinsu. Tare da wasu babu pigment kwata-kwata. Daya karshen bakan na zabiya shine "wani nau'i na zabiya da ake kira rufous oculocutaneous albinism, wanda yawanci yakan shafi mutane masu duhu".[4]
--Manazarta--
- ↑ "albino". Random House Dictionary. 2017. Retrieved 10 November 2017 – via Dictionary.Reference.com.
- ↑ "American Pronunciation of albino". Macmillan Dictionary. 2017. Retrieved 10 November 2017.
- ↑ Kaplan, J.; De Domenico, I.; Ward, D. M. (2008). "Chediak-Higashi syndrome". Current Opinion in Hematology. 15 (1): 22–29. doi:10.1097/MOH.0b013e3282f2bcce. PMID 18043242. S2CID 43243529.
- ↑ "Albinism". Encyclopædia Britannica. Retrieved 27 January 2015.