{"id":80938,"date":"2018-05-04T13:08:23","date_gmt":"2018-05-04T13:08:23","guid":{"rendered":"http:\/\/humanitasnet-new.local\/enciclopedia\/paratiroidna-zlezda\/"},"modified":"2018-05-04T13:08:23","modified_gmt":"2018-05-04T13:08:23","slug":"paratiroidna-zlezda","status":"publish","type":"enciclopedia","link":"https:\/\/humanitas-net.humweb.webiz.team\/sr\/wiki\/paratiroidna-zlezda\/","title":{"rendered":"Paratiroidna \u017elezda"},"content":{"rendered":"<p>Paratiroidna \u017elezda ili paratioridea omogu\u0107ava produkciju i endokrinu sekreciju (unutra\u0161nju) paatioidnog hormona, naro\u010dito hormona od vitalnog zna\u010daja u regulaciji metabolizma minerala (posebno kalcijuma i fosfora) unutar oganizma.<\/p>\n<p>&nbsp;<\/p>\n<p>Paratiroidne \u017elezde poseduju specifi\u010dnu, enkapsuliranu i glatku povr\u0161inu svetlo braon pebojene usled visokog sadr\u017eaja masti kao i oksifilnih \u0107elija\u00a0 u samim \u017elezdama. Prisustvo \u017eute boje oko \u017elezda mo\u017ee se pogre\u0161no identifikovati kao okolna masna struktura.<\/p>\n<p>&nbsp;<\/p>\n<h2 id=\"gde-su-lokalizovane-paratiroidne-zlezde\">Gde su lokalizovane paratiroidne \u017elezde ?<\/h2>\n<p>&nbsp;<\/p>\n<p>Paratiroidne \u017elezde ograni\u010dene su veli\u010dine koja iznosi oko 0.5 do 1 cm. Prekrivene su fibroznom kapsulom, unutar koje su sadr\u017eane \u0107elije aran\u017eirane u vidu vrpce u tri divizije: glavne \u0107elije (male i polihedralne \u0107elije), jasne \u0107elije (relativno krupne) , oksifilne \u0107elije (\u0107elije koje poseduju oksifil u citoplazmi ili acidofilne granule).<\/p>\n<p>&nbsp;<\/p>\n<p>Paratiroidne \u017elezde lokalizovane su iza tiroidne \u017elezde i sastoje se od 4 \u017elezde (ili dva para paratiroidnih \u017elezda),ali ih mo\u017ee biti \u010dak 5 ili 6.<\/p>\n<p>&nbsp;<\/p>\n<p>Njihovo ime odra\u017eava bliski anatomski odnos sa tiroidnom \u017elezdom. Naj\u010de\u0161\u0107e su dve paratiroidne \u017elezde: gornje i dve donje paratiroidne \u017elezde ili gornja i donja paratiroidna \u017elezda.<\/p>\n<p>&nbsp;<\/p>\n<p>Gonji par paratioidnih \u017elezda naj\u010de\u0161\u0107e je lokalizovan iza tiroidne \u017elezde, dok je donji pa lokalizovan izme\u0111u grana donje tirioide.<\/p>\n<p>&nbsp;<\/p>\n<p>Gornje paatioidne \u017elezde snabdevaju se krvlju putem donje tiroidne arterije ili anastomoti\u010dnih grana lokalizovanih izme\u0111u donje i gornje tiroidne arterije.<\/p>\n<p>&nbsp;<\/p>\n<p>Sa druge strane, donja inferiorna arterija naj\u010de\u0161\u0107e se snabdeva donjim paratiodinim \u017elezdama. Kada je donja tiroidna \u017elezda odsutna, grane gornje tiroidne arterije snabdevaju donje paratirioidne \u017elezde.<\/p>\n<p>&nbsp;<\/p>\n<h2 id=\"koja-je-funkcija-paratiroidnih-zlezda\">Koja je funkcija paratiroidnih \u017elezda ?<\/h2>\n<p>&nbsp;<\/p>\n<p>Glavna funkcija paratiroidnih \u017elezda jeste regulacija nivoa kalcijuma u organizmu unutar fiziolo\u0161kih vrednosti radi adekvatnog funckionisanja mi\u0161i\u0107nog i nervnog tkiva.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Kalcijum predstavlja osnovni element koji uslovljava mi\u0161i\u0107nu kontrakciju, te predstavlja osnovni elemenat kostiju omogu\u0107avaju\u0107i adekvatnu\u00a0 rigidnost kostiju kao i sprovo\u0111enje elektri\u010dnih impulsa du\u017e nerava.<\/p>\n<p>&nbsp;<\/p>\n<p>Bilo koja redukcija u nivou kalcijuma signalizira paratirodinim \u017elezdama da zapo\u010dnu produkciju paratiroidnog hormona koji reguli\u0161e nivo kalcijuma u organizmu.<\/p>\n<p>&nbsp;<\/p>\n<p>Nadalje, funkcija paratiroidnih \u017elezda jeste produkcija i sekrecija paratiroidnog hormona (PTH).\u00a0 PTH predstavlja aminokiselinski lanac od 84 kiseline sa funkcijom kontrole\u00a0 regulatornih faktora\u00a0 kalcijuma\/fosfata u\u00a0 organizmu i odr\u017eavanje metabolizma\u00a0 kostiju.<\/p>\n<p>&nbsp;<\/p>\n<p>U bubrezima stimuli\u0161e reapsorpciju kalcijuma i ekskreciju fosfata, dok u crevima paratiroidni hormone stimuli\u0161e apsorpciju kalcijuma.<\/p>\n<p>&nbsp;<\/p>\n<p>Produkcija ovog hormona izaziva transfer kalcijuma iz kosti u cirkulaciju, dok njegova deficijencija izaziva redukciju koncentracije kalcijuma u krvi, \u0161to rezultuje pojavom hipertoni\u010dnih mi\u0161i\u0107a (\u0161to potvr\u0111uje vitalnu ulogu koju kalcijum ima u regulaciji mi\u0161i\u0107ne kontrakcije).<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","Example":[1789],"class_list":["post-80938","enciclopedia","type-enciclopedia","status-publish","hentry","enciclopedia_category-anatomija"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Paratiroidna \u017elezda - Humanitas.net<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"sr_RS\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Paratiroidna \u017elezda - Humanitas.net\" \/>\n<meta property=\"og:description\" content=\"Paratiroidna \u017elezda ili paratioridea omogu\u0107ava produkciju i endokrinu sekreciju (unutra\u0161nju) paatioidnog hormona, naro\u010dito hormona od vitalnog zna\u010daja u regulaciji metabolizma minerala (posebno kalcijuma i fosfora) unutar oganizma. &nbsp; Paratiroidne \u017elezde poseduju specifi\u010dnu, enkapsuliranu i glatku povr\u0161inu svetlo braon pebojene usled visokog sadr\u017eaja masti kao i oksifilnih \u0107elija\u00a0 u samim \u017elezdama. 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