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id="toc-Funksjon-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul innholdsfortegnelsen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul innholdsfortegnelsen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Det sympatiske nervesystemet</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til en artikkel på et annet språk. Tilgjengelig på 51 språk" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-51" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">51 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Sympatiske_nervesystem" title="Sympatiske nervesystem – dansk" lang="da" hreflang="da" data-title="Sympatiske nervesystem" data-language-autonym="Dansk" data-language-local-name="dansk" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Sympatiska_nervsystemet" title="Sympatiska nervsystemet – svensk" lang="sv" hreflang="sv" data-title="Sympatiska nervsystemet" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-is badge-Q70893996 mw-list-item" title=""><a href="https://is.wikipedia.org/wiki/Driftaugakerfi%C3%B0" title="Driftaugakerfið – islandsk" lang="is" hreflang="is" data-title="Driftaugakerfið" data-language-autonym="Íslenska" data-language-local-name="islandsk" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D9%87%D8%A7%D8%B2_%D8%B9%D8%B5%D8%A8%D9%8A_%D9%88%D8%AF%D9%8A" title="جهاز عصبي ودي – arabisk" lang="ar" hreflang="ar" data-title="جهاز عصبي ودي" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Simpatik_sinir_sistemi" title="Simpatik sinir sistemi – aserbajdsjansk" lang="az" hreflang="az" data-title="Simpatik sinir sistemi" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D1%96%D0%BC%D0%BF%D0%B0%D1%82%D1%8B%D1%87%D0%BD%D0%B0%D1%8F_%D0%BD%D0%B5%D1%80%D0%B2%D0%BE%D0%B2%D0%B0%D1%8F_%D1%81%D1%96%D1%81%D1%82%D1%8D%D0%BC%D0%B0" title="Сімпатычная нервовая сістэма – belarusisk" lang="be" hreflang="be" data-title="Сімпатычная нервовая сістэма" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BC%D0%BF%D0%B0%D1%82%D0%B8%D0%BA%D0%BE%D0%B2%D0%B0_%D1%87%D0%B0%D1%81%D1%82_%D0%BD%D0%B0_%D0%92%D0%9D%D0%A1" title="Симпатикова част на ВНС – bulgarsk" lang="bg" hreflang="bg" data-title="Симпатикова част на ВНС" data-language-autonym="Български" data-language-local-name="bulgarsk" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Simpati%C4%8Dki_nervni_sistem" title="Simpatički nervni sistem – bosnisk" lang="bs" hreflang="bs" data-title="Simpatički nervni sistem" data-language-autonym="Bosanski" data-language-local-name="bosnisk" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Sistema_nervi%C3%B3s_simp%C3%A0tic" title="Sistema nerviós simpàtic – katalansk" lang="ca" hreflang="ca" data-title="Sistema nerviós simpàtic" data-language-autonym="Català" data-language-local-name="katalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Sympatikus" title="Sympatikus – tsjekkisk" lang="cs" hreflang="cs" data-title="Sympatikus" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Sympathikus" title="Sympathikus – tysk" lang="de" hreflang="de" data-title="Sympathikus" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dv mw-list-item"><a href="https://dv.wikipedia.org/wiki/%DE%90%DE%A8%DE%89%DE%B0%DE%95%DE%A6%DE%8C%DE%AC%DE%93%DE%A8%DE%86%DE%B0_%DE%82%DE%A7%DE%83%DE%88%DE%A6%DE%90%DE%B0_%DE%90%DE%A8%DE%90%DE%B0%DE%93%DE%A6%DE%89%DE%B0" title="ސިމްޕަތެޓިކް ނާރވަސް ސިސްޓަމް – divehi" lang="dv" hreflang="dv" data-title="ސިމްޕަތެޓިކް ނާރވަސް ސިސްޓަމް" data-language-autonym="ދިވެހިބަސް" data-language-local-name="divehi" class="interlanguage-link-target"><span>ދިވެހިބަސް</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/S%C3%BCmpaatiline_n%C3%A4rvis%C3%BCsteem" title="Sümpaatiline närvisüsteem – estisk" lang="et" hreflang="et" data-title="Sümpaatiline närvisüsteem" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A3%CF%85%CE%BC%CF%80%CE%B1%CE%B8%CE%B7%CF%84%CE%B9%CE%BA%CF%8C_%CE%BD%CE%B5%CF%85%CF%81%CE%B9%CE%BA%CF%8C_%CF%83%CF%8D%CF%83%CF%84%CE%B7%CE%BC%CE%B1" title="Συμπαθητικό νευρικό σύστημα – gresk" lang="el" hreflang="el" data-title="Συμπαθητικό νευρικό σύστημα" data-language-autonym="Ελληνικά" data-language-local-name="gresk" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Sympathetic_nervous_system" title="Sympathetic nervous system – engelsk" lang="en" hreflang="en" data-title="Sympathetic nervous system" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Sistema_nervioso_simp%C3%A1tico" title="Sistema nervioso simpático – spansk" lang="es" hreflang="es" data-title="Sistema nervioso simpático" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Simpata_nerva_sistemo" title="Simpata nerva sistemo – esperanto" lang="eo" hreflang="eo" data-title="Simpata nerva sistemo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Nerbio-sistema_sinpatiko" title="Nerbio-sistema sinpatiko – baskisk" lang="eu" hreflang="eu" data-title="Nerbio-sistema sinpatiko" data-language-autonym="Euskara" data-language-local-name="baskisk" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AF%D8%B3%D8%AA%DA%AF%D8%A7%D9%87_%D8%B9%D8%B5%D8%A8%DB%8C_%D8%B3%D9%85%D9%BE%D8%A7%D8%AA%DB%8C%DA%A9" title="دستگاه عصبی سمپاتیک – persisk" lang="fa" hreflang="fa" data-title="دستگاه عصبی سمپاتیک" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Syst%C3%A8me_nerveux_sympathique" title="Système nerveux sympathique – fransk" lang="fr" hreflang="fr" data-title="Système nerveux sympathique" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Sistema_nervioso_simp%C3%A1tico" title="Sistema nervioso simpático – galisisk" lang="gl" hreflang="gl" data-title="Sistema nervioso simpático" data-language-autonym="Galego" data-language-local-name="galisisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B5%90%EA%B0%90%EC%8B%A0%EA%B2%BD%EA%B3%84" title="교감신경계 – koreansk" lang="ko" hreflang="ko" data-title="교감신경계" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8D%D5%AB%D5%B4%D5%BA%D5%A1%D5%A9%D5%AB%D5%AF_%D5%B6%D5%B5%D5%A1%D6%80%D5%A4%D5%A1%D5%B5%D5%AB%D5%B6_%D5%B0%D5%A1%D5%B4%D5%A1%D5%AF%D5%A1%D6%80%D5%A3" title="Սիմպաթիկ նյարդային համակարգ – armensk" lang="hy" hreflang="hy" data-title="Սիմպաթիկ նյարդային համակարգ" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%A8%E0%A5%81%E0%A4%95%E0%A4%82%E0%A4%AA%E0%A5%80_%E0%A4%A4%E0%A4%82%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%BF%E0%A4%95%E0%A4%BE%E0%A4%A4%E0%A4%82%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="अनुकंपी तंत्रिकातंत्र – hindi" lang="hi" hreflang="hi" data-title="अनुकंपी तंत्रिकातंत्र" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Simpatikus" title="Simpatikus – kroatisk" lang="hr" hreflang="hr" data-title="Simpatikus" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Sistem_saraf_simpatis" title="Sistem saraf simpatis – indonesisk" lang="id" hreflang="id" data-title="Sistem saraf simpatis" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Sistema_nervoso_simpatico" title="Sistema nervoso simpatico – italiensk" lang="it" hreflang="it" data-title="Sistema nervoso simpatico" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%A2%D7%A8%D7%9B%D7%AA_%D7%94%D7%A2%D7%A6%D7%91%D7%99%D7%9D_%D7%94%D7%A1%D7%99%D7%9E%D7%A4%D7%AA%D7%98%D7%99%D7%AA" title="מערכת העצבים הסימפתטית – hebraisk" lang="he" hreflang="he" data-title="מערכת העצבים הסימפתטית" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BC%D0%BF%D0%B0%D1%82%D0%B8%D0%BA%D0%B0%D0%BB%D1%8B%D2%9B_%D0%B6%D2%AF%D0%B9%D0%BA%D0%B5_%D0%B6%D2%AF%D0%B9%D0%B5%D1%81%D1%96" title="Симпатикалық жүйке жүйесі – kasakhisk" lang="kk" hreflang="kk" data-title="Симпатикалық жүйке жүйесі" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Sist%C3%A8m_senpatik" title="Sistèm senpatik – haitisk" lang="ht" hreflang="ht" data-title="Sistèm senpatik" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitisk" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Simpatin%C4%97_nerv%C5%B3_sistema" title="Simpatinė nervų sistema – litauisk" lang="lt" hreflang="lt" data-title="Simpatinė nervų sistema" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Sistem_saraf_simpatetik" title="Sistem saraf simpatetik – malayisk" lang="ms" hreflang="ms" data-title="Sistem saraf simpatetik" data-language-autonym="Bahasa Melayu" data-language-local-name="malayisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Orthosympathisch_zenuwstelsel" title="Orthosympathisch zenuwstelsel – nederlandsk" lang="nl" hreflang="nl" data-title="Orthosympathisch zenuwstelsel" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E4%BA%A4%E6%84%9F%E7%A5%9E%E7%B5%8C%E7%B3%BB" title="交感神経系 – japansk" lang="ja" hreflang="ja" data-title="交感神経系" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Simpatik_nerv_sistemasi" title="Simpatik nerv sistemasi – usbekisk" lang="uz" hreflang="uz" data-title="Simpatik nerv sistemasi" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Uk%C5%82ad_wsp%C3%B3%C5%82czulny" title="Układ współczulny – polsk" lang="pl" hreflang="pl" data-title="Układ współczulny" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Sistema_nervoso_simp%C3%A1tico" title="Sistema nervoso simpático – portugisisk" lang="pt" hreflang="pt" data-title="Sistema nervoso simpático" data-language-autonym="Português" data-language-local-name="portugisisk" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Sistem_nervos_simpatic" title="Sistem nervos simpatic – rumensk" lang="ro" hreflang="ro" data-title="Sistem nervos simpatic" data-language-autonym="Română" data-language-local-name="rumensk" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BC%D0%BF%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BD%D0%B5%D1%80%D0%B2%D0%BD%D0%B0%D1%8F_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0" title="Симпатическая нервная система – russisk" lang="ru" hreflang="ru" data-title="Симпатическая нервная система" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Sympathetic_nervous_system" title="Sympathetic nervous system – enkel engelsk" lang="en-simple" hreflang="en-simple" data-title="Sympathetic nervous system" data-language-autonym="Simple English" data-language-local-name="enkel engelsk" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Sympatick%C3%BD_nervov%C3%BD_syst%C3%A9m" title="Sympatický nervový systém – slovakisk" lang="sk" hreflang="sk" data-title="Sympatický nervový systém" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Simpati%C4%8Dno_%C5%BEiv%C4%8Devje" title="Simpatično živčevje – slovensk" lang="sl" hreflang="sl" data-title="Simpatično živčevje" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Simpati%C4%8Dki_nervni_sistem" title="Simpatički nervni sistem – serbisk" lang="sr" hreflang="sr" data-title="Simpatički nervni sistem" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Simpati%C4%8Dki_nervni_sistem" title="Simpatički nervni sistem – serbokroatisk" lang="sh" hreflang="sh" data-title="Simpatički nervni sistem" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Sympaattinen_hermosto" title="Sympaattinen hermosto – finsk" lang="fi" hreflang="fi" data-title="Sympaattinen hermosto" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%A3%E0%B8%B0%E0%B8%9A%E0%B8%9A%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%AA%E0%B8%B2%E0%B8%97%E0%B8%8B%E0%B8%B4%E0%B8%A1%E0%B8%9E%E0%B8%B2%E0%B9%80%E0%B8%97%E0%B8%95%E0%B8%B4%E0%B8%81" title="ระบบประสาทซิมพาเทติก – thai" lang="th" hreflang="th" data-title="ระบบประสาทซิมพาเทติก" data-language-autonym="ไทย" 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</div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="nb" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r24553676">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}html.client-js body.skin-minerva .mw-parser-output .mbox-text-span{margin-left:23px!important}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}</style><table class="plainlinks metadata ambox ambox-content ambox-Unsourced" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/Fil:Question_book-new.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span"><b>Kildeløs</b>: Denne artikkelen mangler <a href="/wiki/Wikipedia:Bruk_av_kilder" title="Wikipedia:Bruk av kilder">kildehenvisninger</a>, og opplysningene i den kan dermed være vanskelige å <a href="/wiki/Wikipedia:Verifiserbarhet" title="Wikipedia:Verifiserbarhet">verifisere</a>. Kildeløst materiale kan bli <a href="/wiki/Wikipedia:Verifiserbarhet#Bevisbyrden" title="Wikipedia:Verifiserbarhet">fjernet</a>. Helt uten kilder. <span class="date-container"><i>(<span class="date">10. okt. 2015</span>)</i></span></div></td></tr></tbody></table> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Fil:Autonome_nervesystem.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Autonome_nervesystem.png/350px-Autonome_nervesystem.png" decoding="async" width="350" height="280" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/6/6f/Autonome_nervesystem.png 1.5x" data-file-width="500" data-file-height="400" /></a><figcaption>Det autonome nervesystem.</figcaption></figure> <p><b>Det sympatiske nervesystem</b> (i forkortet form <b>SNS</b>; også kalt <b>det adrenerge nervesystem</b> eller <b>sympaticus</b>) danner sammen med <a href="/wiki/Det_parasympatiske_nervesystem" class="mw-redirect" title="Det parasympatiske nervesystem">det parasympatiske nervesystem</a> <a href="/wiki/Det_autonome_nervesystem" title="Det autonome nervesystem">det autonome nervesystem</a>. Det sympatiske nervesystem gjør det, forenklet sett, mulig for kroppen å reagere hurtig og målrettet på fare. </p> <div class="mw-heading mw-heading2"><h2 id="Funksjon">Funksjon</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Det_sympatiske_nervesystemet&veaction=edit&section=1" title="Rediger avsnitt: Funksjon" class="mw-editsection-visualeditor"><span>rediger</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Det_sympatiske_nervesystemet&action=edit&section=1" title="Rediger kildekoden til seksjonen Funksjon"><span>rediger kilde</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Den sympatiske delen av det autonome nervesystemet er et krisesystem som setter kroppen i stand til bedre å mestre en krisesituasjon. Det kan tre i kraft ved fysiske anstrengelser, oksygenmangel og nedkjøling. Det virker blant annet med at <a href="/wiki/Puls" title="Puls">pulsen</a> øker, og <a href="/wiki/Blodtrykk" title="Blodtrykk">blodtrykket</a> stiger for å øke blodsirkulasjonen. Det stimulerer også til å skille ut <a href="/wiki/Hormon" title="Hormon">hormonene</a> <a href="/wiki/Adrenalin" title="Adrenalin">adrenalin</a> og <a href="/wiki/Noradrenalin" title="Noradrenalin">noradrenalin</a>. Disse hormonene påvirker organene på samme måte som økt aktivitet i de sympatiske nervene. </p><p>Det sympatiske nervesystem aktiverer hva som populært kalles <a href="/wiki/%C2%ABkjemp_eller_flykt%C2%BB-respons" class="mw-redirect" title="«kjemp eller flykt»-respons">«kjemp eller flykt»-responsen</a>. Denne respons er også kjent som den <i>sympatetisk-adrenale</i> kropprespons, da visse sympatiske fibre som ender i <a href="/wiki/Binyre" title="Binyre">binyrene</a> (men også alle andre sympatiske fibre) utskiller <a href="/w/index.php?title=Acetylcholin&action=edit&redlink=1" class="new" title="Acetylcholin (ikke skrevet ennå)">acetylcholin</a>, noe som aktiverer utskillelsen av <a href="/wiki/Adrenalin" title="Adrenalin">adrenalin</a> og <a href="/wiki/Noradrenalin" title="Noradrenalin">noradrenalin</a>. 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