{"id":20223,"date":"2011-03-05T11:36:00","date_gmt":"2011-03-05T11:36:00","guid":{"rendered":"http:\/\/trainingsnews.com\/reglarea-cordului-si-vaselor-3"},"modified":"2011-03-05T11:36:00","modified_gmt":"2011-03-05T11:36:00","slug":"reglarea-cordului-si-vaselor-3","status":"publish","type":"post","link":"https:\/\/cvnextjob.com\/index.php\/2011\/03\/05\/reglarea-cordului-si-vaselor-3\/","title":{"rendered":"REGLAREA CORDULUI SI VASELOR"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div><div><span lang=\"RO\" style=\"font-family: &quot;Times New Roman&quot;; font-size: 12pt;\">Intrarea \u00een func\u0163iune a mecanismelor de reglare a cordului \u015fi vaselor este declan\u015fat\u0103 de modific\u0103rile de presiune din vasele mari \u015fi cord. Uneori mobilizarea acestor mecanisme este consecin\u0163a unor modific\u0103ri umorale.<\/span><\/div>\n<div style=\"margin-left: 36pt;\"><span lang=\"RO\" style=\"font-family: &quot;Times New Roman&quot;; font-size: 12pt;\">Varia\u0163iile presionale sau de compozi\u0163ie chimic\u0103 a s\u00e2ngelui \u00een sectoarele dotate cu receptori determin\u0103 tulburarea ritmului desc\u0103rc\u0103rilor de impulsuri aferente spre centrii bulbari urmat\u0103 de modificarea tonusului acestor centri \u015fi mobilizarea de mecanisme vegetative, endocrine \u015fi umorale care tind s\u0103 readuc\u0103 la normal constantele tulburate. <\/span><\/div>\n<div><span lang=\"RO\" style=\"font-family: &quot;Times New Roman&quot;; font-size: 12pt;\">\u00cen condi\u0163ii fiziologice, din volumul sanguin total 10% se g\u0103sesc \u00een cord, 8% se g\u0103sesc \u00een circula\u0163ia pulmonar\u0103, 12% \u00een artere, 5% \u00een capilare \u015fi app. 65% \u00een sectorul venos (\u00een special \u00een venule \u015fi venele mici).&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mecanismele de reglare ac\u0163ioneaz\u0103 modific\u00e2nd dup\u0103 necesit\u0103\u0163i calibrul arteriolelor \u015fi\/sau al sectorului venos precum \u015fi reparti\u0163ia s\u00e2ngelui \u00eentre diferite sectoare vasculare men\u0163in\u00e2nd astfel hemodinamica normal\u0103 \u00een pofida varia\u0163iilor iriga\u0163iei sistemice sau locale.<\/span><\/div>\n<div style=\"margin-left: 36pt;\"><span lang=\"RO\" style=\"font-family: &quot;Times New Roman&quot;; font-size: 12pt;\">Arteriolele opun cea mai mare rezisten\u0163\u0103 fluxului sanguin (=vasele rezisten\u0163ei) iar modific\u0103rile tonusului lor influen\u0163eaz\u0103 debitul sanguin tisular prin modificarea fluxului capilar. Capilarele nu au celule musculare sau fibre nervoase motorii \u00een structura pere\u0163ilor, de aceea modific\u0103rile de calibru sunt \u00een cea mai mare parte pasive fiind determinate de vasodilata\u0163ia arteriolelor \u015fi de staza venoas\u0103. Dar volumul cel mai mare de s\u00e2nge este cuprins \u00een sectorul venos (=vasele capacit\u0103\u0163ii), de aceea, men\u0163inerea tonusului acestui sector (\u00een special al venulelor \u015fi venelor mici) dotate cu putere de vasomotricitate&nbsp; de\u0163ine cea mai mare importan\u0163\u0103 pentru men\u0163inerea hemodinamicii.<\/span><\/div>\n<div><span lang=\"RO\" style=\"font-family: &quot;Times New Roman&quot;; font-size: 12pt;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Activitatea cordului \u015fi tonusul patului vascular sunt reglate pe cale neurovegetativ\u0103 \u015fi umoral\u0103, sistemul circulator av\u00e2nd o bogat\u0103 inerva\u0163ie vegetativ\u0103, dar \u015fi de o serie de substan\u0163e de natur\u0103 hormonal\u0103 sau umoral\u0103 prezente \u00een s\u00e2nge. Modific\u0103rile adaptative cardiovasculare \u00een diferite condi\u0163ii fiziologice se realizeaz\u0103 prin mecanisme complexe de reglare intrinseci \u015fi extrinseci.<\/span><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Intrarea \u00een func\u0163iune a mecanismelor de reglare a cordului \u015fi vaselor este declan\u015fat\u0103 de modific\u0103rile de presiune din vasele mari \u015fi cord. Uneori mobilizarea acestor mecanisme este consecin\u0163a unor modific\u0103ri umorale. Varia\u0163iile presionale sau de compozi\u0163ie chimic\u0103 a s\u00e2ngelui \u00een sectoarele dotate cu receptori determin\u0103 tulburarea ritmului desc\u0103rc\u0103rilor de impulsuri aferente spre centrii bulbari urmat\u0103 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts\/20223"}],"collection":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/comments?post=20223"}],"version-history":[{"count":0,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/posts\/20223\/revisions"}],"wp:attachment":[{"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/media?parent=20223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/categories?post=20223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cvnextjob.com\/index.php\/wp-json\/wp\/v2\/tags?post=20223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}