{"id":21045746,"date":"2019-02-04T19:28:58","date_gmt":"2019-02-04T18:28:58","guid":{"rendered":"https:\/\/geek.hr\/znanost\/?p=21045746"},"modified":"2019-02-10T22:05:13","modified_gmt":"2019-02-10T21:05:13","slug":"istine-i-zablude-o-odrzavanju-tjelesne-topline-zimi","status":"publish","type":"post","link":"https:\/\/geek.hr\/znanost\/clanak\/istine-i-zablude-o-odrzavanju-tjelesne-topline-zimi\/","title":{"rendered":"Istine i zablude o odr\u017eavanju tjelesne topline zimi"},"content":{"rendered":"<p>Procesi koje na\u0161a tijela koriste za zagrijavanje su fascinantni. Ipak, za vrijeme ni\u017eih temperatura odr\u017eavanje normalne tjelesne temperature <a href=\"https:\/\/theconversation.com\/its-cold-a-physiologist-explains-how-to-keep-your-body-feeling-warm-108816\" target=\"_blank\" rel=\"noopener\">postaje izazov.<\/a><\/p>\n<h4>Ko\u017ea i mi\u0161i\u0107i<\/h4>\n<p>Krv te\u010de kroz tijelo nose\u0107i hranjive tvari, kisik i druge va\u017ene supstance. Tim dostavnim sustavom tako\u0111er dovodi toplinu proizvedenu u mi\u0161i\u0107ima do ko\u017ee, gdje se osloba\u0111a.<\/p>\n<p>Kada smo u hladnom okru\u017eenju, tijelo nam preraspodjeljuje krv u torzo, odr\u017eavaju\u0107i toplinu vitalnih organa. Istovremeno, tijelo ograni\u010dava dotok krvi u ko\u017eu. To zna\u010di da mo\u017eemo dulje vremena zadr\u017eati unutra\u0161nju toplinu.<\/p>\n<p>Druga obrambena strategija je mi\u0161i\u0107na aktivnost. To ubrzava metabolizam i stvara vi\u0161e topline.<\/p>\n<p>Razlike u veli\u010dini tijela, tjelesnoj masi te metaboli\u010dkoj aktivnosti utje\u010du na to <a href=\"https:\/\/theconversation.com\/health-check-why-do-some-people-feel-the-cold-more-than-others-37805\" target=\"_blank\" rel=\"noopener\">kako razli\u010diti ljudi do\u017eivljavaju hladno\u0107u<\/a>. Ni\u017ee osobe s manjim razinama tjelesne masno\u0107e gube vi\u0161e topline u okoli\u0161u od ve\u0107ih ljudi s vi\u0161im tjelesnim masama. Vi\u0161a osoba mo\u017ee imati pove\u0107anu mi\u0161i\u0107nu masu koja je proizvo\u0111a\u010d topline, ili ve\u0107u tjelesnu masu koja funkcionira poput izolatora za smanjenje gubitka topline.<\/p>\n<p>Kako bi se odr\u017eao osje\u0107aj topline, mo\u017eemo manipulirati odje\u0107om, aktivnostima i hranom.<\/p>\n<h4>Vanjska pomagala i druge nuspojave<\/h4>\n<p>Deblja odje\u0107a i slojevito obla\u010denje uvijek poma\u017eu. Ipak, zimska odje\u0107a nije tu da nas ugrije, nego da odr\u017ei toplinu koju tijelo proizvede.\u00a0Fizi\u010dka aktivnost tako\u0111er poma\u017ee, jer uzrokuje kontrakciju mi\u0161i\u0107a \u0161to onda generira toplinu.<\/p>\n<p>Suprotno uvrije\u017eenom mi\u0161ljenju, glava ipak nije ve\u0107i izvor gubitka topline od nekog drugog prikladno prekrivenog dijela tijela.<\/p>\n<p>Na\u017ealost, fizi\u010dka aktivnost ili slojevito obla\u010denje mogu pomjeriti ravnote\u017eu s onoga \u0161to zaista trebamo kako bismo nadoknadili gubitak topline. U tom slu\u010daju \u0107emo osjetiti pove\u0107anje tjelesne temperature i tijelo \u0107e se po\u010deti znojiti u poku\u0161aju da se ohladi. To nije dobar ishod, jer isparavanje znoja dovodi do gubitka topline.<\/p>\n<p>Napokon, prehrana isto tako pove\u0107ava proizvodnju tjelesne topline, no proces razgradnje hrane nema tako veliki u\u010dinak na pove\u0107avanje tjelesne temperature.<\/p>\n<p>Tako\u0111er se mo\u017ee pojaviti potreba za mokrenjem, ono \u0161to se naziva hladnom diurezom. Nuspojava je to su\u017eavanja krvnih \u017eila i rezultiraju\u0107eg pove\u0107anja krvnog tlaka jer ista koli\u010dina krvi ima manje prostor za putovanje kroz tijelo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kako se vi utopljavate u hladnim danima?<\/p>\n","protected":false},"author":10022,"featured_media":21045745,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[16327],"tags":[18832,17661],"class_list":["post-21045746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdravlje-i-medicina","tag-toplina","tag-zima"],"modified_by":null,"_links":{"self":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21045746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/users\/10022"}],"replies":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/comments?post=21045746"}],"version-history":[{"count":0,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21045746\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media\/21045745"}],"wp:attachment":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media?parent=21045746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/categories?post=21045746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/tags?post=21045746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}