D\u0131\u015ftan ve i\u00e7ten gelen uyar\u0131lar\u0131n etkisi ile n\u00f6ronda meydana gelen de\u011fi\u015fikli\u011fe impuls denir. \u0130mpulsun iletim y\u00f6n\u00fc: Dendrit \u00e0 H\u00fccre g\u00f6vdesi \u00e0 Akson do\u011frultusundad\u0131r.
\n \u0130mpulsun iletimi elektro kimyasal bir olayd\u0131r.
\n Dinlenme halindeki bir n\u00f6ronda h\u00fccre zar\u0131n\u0131n d\u0131\u015f k\u0131sm\u0131 \u201c+\u201d i\u00e7 k\u0131sm\u0131 \u201c\u2013\u201c y\u00fckl\u00fcd\u00fcr. H\u00fccrenin bu haline polarizasyon (kutupla\u015fma) denir. Bu olay Na ve K iyonlar\u0131n\u0131n e\u015fit olmayan da\u011f\u0131l\u0131m\u0131ndan kaynaklan\u0131r.
\n Uyar\u0131lan sinir h\u00fccrelerini d\u0131\u015f k\u0131sm\u0131 \u201c\u2013\u201c i\u00e7 k\u0131sm\u0131 \u201c+\u201d y\u00fckl\u00fc duruma ge\u00e7er. Bu olaya depolarizasyon denir. Bu i\u015flem s\u0131ras\u0131nda h\u00fccre bol miktarda O2 harcar, ATP kullan\u0131r. Sonu\u00e7ta CO2 ve \u0131s\u0131 olu\u015fur.<\/p>\n
\u0130mpuls iletimi tamamlan\u0131nca n\u00f6ron tekrar eski durumuna gelir. Buna da repolarizasyon denir.
\n Depolarizasyon durumundaki sinir h\u00fccresi ikinci bir uyart\u0131ya cevap veremez, repolarize olmas\u0131 gerekir.<\/p>\n
E\u015fik \u015eiddeti: Sinir h\u00fccresinin uyar\u0131lmas\u0131 i\u00e7in gereken minimum uyart\u0131 \u015fiddetidir. E\u015fik \u015fiddetinin alt\u0131ndaki uyar\u0131lara sinir h\u00fccresi cevap veremez. E\u015fik de\u011ferde ve \u00fczerindeki uyar\u0131lara cevap verir. Buna ya hep ya hi\u00e7 kural\u0131 denir. Uyart\u0131 e\u015fik \u015fiddetin \u00fczerinde oldu\u011funda impulsun h\u0131z\u0131 ve etkisi de\u011fi\u015fmez, say\u0131s\u0131 de\u011fi\u015fir.
\n Uyarman\u0131n frekans\u0131, \u015fiddeti ve s\u00fcresi, n\u00f6ronlar\u0131n say\u0131s\u0131, dizili\u015fleri ve aralar\u0131ndaki ba\u011flant\u0131 impuls say\u0131s\u0131n\u0131 etkiler.<\/p>\n
Sinaps: Bir n\u00f6ronun dentridi ile di\u011fer n\u00f6ronun aksonunun kar\u015f\u0131la\u015fama noktas\u0131d\u0131r. Uyart\u0131lar\u0131n ak\u0131\u015f y\u00f6n\u00fc sinapslarda aksondan dentrite do\u011fudur.<\/p>\n
\u0130mpulsun N\u00f6rondan N\u00f6rona Ge\u00e7i\u015fi<\/p>\n
\u0130mpulsun akson ucuna gelmesiyle sinaptik keselerden n\u00f6rotransmiter (ta\u015f\u0131y\u0131c\u0131) maddeler salg\u0131lan\u0131r. Di\u011fer sinir h\u00fccresinin dendritindeki resept\u00f6rler taraf\u0131ndan alg\u0131lanan bu maddeler bu h\u00fccrede yeni impulsu ba\u015flat\u0131r. N\u00f6rotransmiter maddeler asetilkolin, noradrenalin, dopamin, seratonin ve histamindir. Sinapslardaki n\u00f6rotransmiter maddelerin salg\u0131lanma miktar\u0131 impuls say\u0131s\u0131na ba\u011fl\u0131d\u0131r.
\n Bir uyart\u0131n\u0131n sinapstan ge\u00e7i\u015fi sinir h\u00fccresinden ge\u00e7i\u015finden daha yava\u015f olur. Yani elektriksel ileteim hormonal iletimden daha h\u0131zl\u0131d\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"
D\u0131\u015ftan ve i\u00e7ten gelen uyar\u0131lar\u0131n etkisi ile n\u00f6ronda meydana gelen de\u011fi\u015fikli\u011fe impuls denir. \u0130mpulsun iletim y\u00f6n\u00fc: Dendrit \u00e0 H\u00fccre g\u00f6vdesi \u00e0 Akson do\u011frultusundad\u0131r. \u0130mpulsun iletimi elektro kimyasal bir olayd\u0131r. Dinlenme halindeki bir n\u00f6ronda h\u00fccre zar\u0131n\u0131n d\u0131\u015f k\u0131sm\u0131 \u201c+\u201d i\u00e7 k\u0131sm\u0131 \u201c\u2013\u201c y\u00fckl\u00fcd\u00fcr. H\u00fccrenin bu haline polarizasyon (kutupla\u015fma) denir. Bu olay Na ve K iyonlar\u0131n\u0131n e\u015fit …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[2406,5974,6440,6438,5976,6437,6439,5977],"class_list":["post-2588","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-akson","tag-dendrit","tag-depolarizasyon","tag-elektro-kimyasal","tag-esik-siddeti","tag-noronlarda-impuls-iletimi","tag-polarizasyon","tag-sinaps"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/2588","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=2588"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/2588\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=2588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=2588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=2588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}