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Stav (synet) - Wikipedia, den frie encyklopædi

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Tilgængelig på 44 sprog" > <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-44" 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">44 sprog</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AE%D9%84%D9%8A%D8%A9_%D8%B9%D8%B5%D9%88%D9%8A%D8%A9" title="خلية عصوية – arabisk" lang="ar" hreflang="ar" data-title="خلية عصوية" 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/%C3%87%C3%B6pc%C3%BCkl%C9%99r" title="Çöpcüklər – aserbajdsjansk" lang="az" hreflang="az" data-title="Çöpcüklər" data-language-autonym="Azərbaycanca" data-language-local-name="aserbajdsjansk" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/%C5%A0tapi%C4%87asta_%C4%87elija" title="Štapićasta ćelija – bosnisk" lang="bs" hreflang="bs" data-title="Štapićasta ćelija" 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/Bastonet_de_la_retina" title="Bastonet de la retina – catalansk" lang="ca" hreflang="ca" data-title="Bastonet de la retina" data-language-autonym="Català" data-language-local-name="catalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AE%D8%A7%D9%86%DB%95%DB%8C_%DA%86%DB%8C%D9%84%DA%A9%DB%95%DB%8C%DB%8C" title="خانەی چیلکەیی – sorani" lang="ckb" hreflang="ckb" data-title="خانەی چیلکەیی" data-language-autonym="کوردی" data-language-local-name="sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Ty%C4%8Dinka_(oko)" title="Tyčinka (oko) – tjekkisk" lang="cs" hreflang="cs" data-title="Tyčinka (oko)" data-language-autonym="Čeština" data-language-local-name="tjekkisk" 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/St%C3%A4bchen_(Auge)" title="Stäbchen (Auge) – tysk" lang="de" hreflang="de" data-title="Stäbchen (Auge)" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Rod_cell" title="Rod cell – engelsk" lang="en" hreflang="en" data-title="Rod cell" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Bastoneto_(%C4%89elo)" title="Bastoneto (ĉelo) – esperanto" lang="eo" hreflang="eo" data-title="Bastoneto (ĉelo)" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Bast%C3%B3n_(c%C3%A9lula)" title="Bastón (célula) – spansk" lang="es" hreflang="es" data-title="Bastón (célula)" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kepikesed" title="Kepikesed – estisk" lang="et" hreflang="et" data-title="Kepikesed" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Makila_(zelula)" title="Makila (zelula) – baskisk" lang="eu" hreflang="eu" data-title="Makila (zelula)" 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%B3%D9%84%D9%88%D9%84_%D8%A7%D8%B3%D8%AA%D9%88%D8%A7%D9%86%D9%87%E2%80%8C%D8%A7%DB%8C" title="سلول استوانه‌ای – persisk" lang="fa" hreflang="fa" data-title="سلول استوانه‌ای" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Sauvasolu" title="Sauvasolu – finsk" lang="fi" hreflang="fi" data-title="Sauvasolu" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/B%C3%A2tonnet" title="Bâtonnet – fransk" lang="fr" hreflang="fr" data-title="Bâtonnet" 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/Bast%C3%B3n_(c%C3%A9lula)" title="Bastón (célula) – galicisk" lang="gl" hreflang="gl" data-title="Bastón (célula)" data-language-autonym="Galego" data-language-local-name="galicisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A7%D7%A0%D7%94_(%D7%A8%D7%90%D7%99%D7%99%D7%94)" title="קנה (ראייה) – hebraisk" lang="he" hreflang="he" data-title="קנה (ראייה)" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B6%E0%A4%B2%E0%A4%BE%E0%A4%95%E0%A4%BE_%E0%A4%95%E0%A5%8B%E0%A4%B6%E0%A4%BF%E0%A4%95%E0%A4%BE" title="शलाका कोशिका – hindi" lang="hi" hreflang="hi" data-title="शलाका कोशिका" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Baton%C3%A8_retinyen" title="Batonè retinyen – haitisk" lang="ht" hreflang="ht" data-title="Batonè retinyen" 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-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Sel_batang_(penglihatan)" title="Sel batang (penglihatan) – indonesisk" lang="id" hreflang="id" data-title="Sel batang (penglihatan)" 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-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Bastonet-celulo" title="Bastonet-celulo – ido" lang="io" hreflang="io" data-title="Bastonet-celulo" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Bastoncello" title="Bastoncello – italiensk" lang="it" hreflang="it" data-title="Bastoncello" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%A1%BF%E4%BD%93%E7%B4%B0%E8%83%9E" title="桿体細胞 – japansk" lang="ja" hreflang="ja" data-title="桿体細胞" 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-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B0%84%EC%83%81%EC%84%B8%ED%8F%AC" title="간상세포 – koreansk" lang="ko" hreflang="ko" data-title="간상세포" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Xaneya_%C3%A7%C3%AElkey%C3%AE" title="Xaneya çîlkeyî – kurdisk" lang="ku" hreflang="ku" data-title="Xaneya çîlkeyî" data-language-autonym="Kurdî" data-language-local-name="kurdisk" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Stiebeliai" title="Stiebeliai – litauisk" lang="lt" hreflang="lt" data-title="Stiebeliai" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A1%D1%82%D0%B0%D0%BF%D1%87%D0%B5_(%D0%BA%D0%BB%D0%B5%D1%82%D0%BA%D0%B0)" title="Стапче (клетка) – makedonsk" lang="mk" hreflang="mk" data-title="Стапче (клетка)" data-language-autonym="Македонски" data-language-local-name="makedonsk" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B1%E0%B5%8B%E0%B4%A1%E0%B5%8D_%E0%B4%95%E0%B5%8B%E0%B4%B6%E0%B4%99%E0%B5%8D%E0%B4%99%E0%B5%BE" title="റോഡ് കോശങ്ങൾ – malayalam" lang="ml" hreflang="ml" data-title="റോഡ് കോശങ്ങൾ" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Sel_batang_(penglihatan)" title="Sel batang (penglihatan) – malajisk" lang="ms" hreflang="ms" data-title="Sel batang (penglihatan)" data-language-autonym="Bahasa Melayu" data-language-local-name="malajisk" 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/Staafje" title="Staafje – nederlandsk" lang="nl" hreflang="nl" data-title="Staafje" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Staver" title="Staver – bokmål" lang="nb" hreflang="nb" data-title="Staver" data-language-autonym="Norsk bokmål" data-language-local-name="bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pr%C4%99ciki_(anatomia)" title="Pręciki (anatomia) – polsk" lang="pl" hreflang="pl" data-title="Pręciki (anatomia)" 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/Bastonete" title="Bastonete – portugisisk" lang="pt" hreflang="pt" data-title="Bastonete" data-language-autonym="Português" data-language-local-name="portugisisk" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D0%BB%D0%BE%D1%87%D0%BA%D0%B8_(%D1%81%D0%B5%D1%82%D1%87%D0%B0%D1%82%D0%BA%D0%B0)" title="Палочки (сетчатка) – russisk" lang="ru" hreflang="ru" data-title="Палочки (сетчатка)" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/%C5%A0tapi%C4%87asta_%C4%87elija" title="Štapićasta ćelija – serbokroatisk" lang="sh" hreflang="sh" data-title="Štapićasta ćelija" 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-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Rod_cell" title="Rod cell – Simple English" lang="en-simple" hreflang="en-simple" data-title="Rod cell" data-language-autonym="Simple English" data-language-local-name="Simple English" 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/Ty%C4%8Dinka_(oko)" title="Tyčinka (oko) – slovakisk" lang="sk" hreflang="sk" data-title="Tyčinka (oko)" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%C5%A0tapi%C4%87asta_%C4%87elija" title="Štapićasta ćelija – serbisk" lang="sr" hreflang="sr" data-title="Štapićasta ćelija" 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-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Stav_(biologi)" title="Stav (biologi) – svensk" lang="sv" hreflang="sv" data-title="Stav (biologi)" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%8B%E0%B8%A5%E0%B8%A5%E0%B9%8C%E0%B8%A3%E0%B8%B9%E0%B8%9B%E0%B9%81%E0%B8%97%E0%B9%88%E0%B8%87" title="เซลล์รูปแท่ง – thai" lang="th" hreflang="th" data-title="เซลล์รูปแท่ง" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C3%87ubuk_h%C3%BCcreleri" title="Çubuk hücreleri – tyrkisk" lang="tr" hreflang="tr" data-title="Çubuk hücreleri" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%B0%D0%BB%D0%B8%D1%87%D0%BA%D0%B0" title="Паличка – ukrainsk" lang="uk" hreflang="uk" data-title="Паличка" data-language-autonym="Українська" data-language-local-name="ukrainsk" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%A7%86%E6%9D%86%E7%BB%86%E8%83%9E" title="视杆细胞 – kinesisk" lang="zh" hreflang="zh" data-title="视杆细胞" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%A6%96%E6%A1%BF%E7%B4%B0%E8%83%9E" title="視桿細胞 – kantonesisk" lang="yue" hreflang="yue" data-title="視桿細胞" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q505544#sitelinks-wikipedia" title="Redigér sproglinks" class="wbc-editpage">Redigér links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Navnerum"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Stav_(synet)" title="Se indholdssiden [c]" accesskey="c"><span>Artikel</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a 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srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Cone-response-en.png/450px-Cone-response-en.png 1.5x, //upload.wikimedia.org/wikipedia/commons/2/2a/Cone-response-en.png 2x" data-file-width="550" data-file-height="346" /></a><figcaption>Stavcellerne (markeret med stiplet sort linje) kan ikke se farver, men er mere lysfølsomme end tapcellerne.</figcaption></figure> <p><b>Stavene</b> er sanseceller på <a href="/wiki/%C3%98je" title="Øje">øjets</a> <a href="/wiki/Nethinde" title="Nethinde">retina (nethinde)</a>. De er meget lysfølsomme (modsat <a href="/wiki/Tap_(synet)" title="Tap (synet)">tappene</a>), det er stavene man bruger til at se med når der er mørkt. Der er kun en slags stave, nemlig dem man ikke kan se farver med. Natdyr, har mange stave, det er derfor de ser godt i mørke. </p><p>Stavcellerne registrerer lys vha. et <a href="/wiki/Membranprotein" title="Membranprotein">membranprotein</a> kaldet <a href="/wiki/Rhodopsin" title="Rhodopsin">rhodopsin</a> bestående af <a href="/w/index.php?title=Retinal&amp;action=edit&amp;redlink=1" class="new" title="Retinal (ikke skrevet endnu)">retinal</a> og <a href="/w/index.php?title=Opsin&amp;action=edit&amp;redlink=1" class="new" title="Opsin (ikke skrevet endnu)">opsin</a>. Når lys rammer stavcellerne sker der en omlejring af en <a href="/wiki/Dobbeltbinding" class="mw-redirect" title="Dobbeltbinding">dobbeltbinding</a> i retinal, som derved aktiverer opsin. Det aktive opsin aktiverer <a href="/w/index.php?title=G-proteinet&amp;action=edit&amp;redlink=1" class="new" title="G-proteinet (ikke skrevet endnu)">G-proteinet</a> transducin, som aktiverer enzymet phosphodiesterase. <a href="/wiki/Enzym" title="Enzym">Enzymet</a> katalyserer nedbrydning af cyklisk GMP (cGMP) til GMP. Normalt holder cGMP en ionkanal i membranen åben, så den lukkes efter cGMPs nedbrydning, og der sker en ændring i <a href="/w/index.php?title=Membranpotentialet&amp;action=edit&amp;redlink=1" class="new" title="Membranpotentialet (ikke skrevet endnu)">membranpotentialet</a>. 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