{"id":7987,"date":"2021-03-10T16:07:51","date_gmt":"2021-03-10T15:07:51","guid":{"rendered":"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/"},"modified":"2021-03-10T16:07:51","modified_gmt":"2021-03-10T15:07:51","slug":"vasoconstriction","status":"publish","type":"glossary","link":"https:\/\/www.atollplongee.com\/en\/glossary\/vasoconstriction\/","title":{"rendered":"Vasoconstriction<\/span>"},"content":{"rendered":"

“La vasoconstriction des vaisseaux sanguins périphériques désigne le phénomène de réduction du diamètre des capillaires sanguins, réduisant la circulation du sang vers la périphérie du corps humain.
\nElle est due à un réflexe du corps humain en réponse à de froides températures.
\nElle a pour conséquence de :
\n•\tLimiter les échanges thermiques dans ces zones (et donc limiter le refroidissement du corps lorsqu’il a froid), donnant un aspect blanchâtre à la peau,
\n•\tConcentrer le sang vers les organes vitaux du thorax.
\nL’augmentation de la pression<\/a> sanguine au niveau du cœur est détectée par les barorécepteurs et entraîne alors en réaction une baisse de la fréquence cardiaque. L’augmentation du volume sanguin dans cette zone est détectée par les volorécepteurs et entraîne alors en réaction l’élimination de son eau via les urines : c’est la diurèse<\/a>, qui peut être une diurèse<\/a> d’immersion ou une diurèse<\/a> due au froid.
\nLe phénomène inverse s’appelle la vasodilatation<\/a> des vaisseaux sanguins périphériques.”<\/p>","protected":false},"excerpt":{"rendered":"

“La vasoconstriction des vaisseaux sanguins p\u00e9riph\u00e9riques d\u00e9signe le ph\u00e9nom\u00e8ne de r\u00e9duction du diam\u00e8tre des capillaires sanguins, r\u00e9duisant la circulation du sang vers la p\u00e9riph\u00e9rie du corps humain. Elle est due \u00e0 un r\u00e9flexe du corps humain en r\u00e9ponse \u00e0 de froides temp\u00e9ratures. Elle a pour cons\u00e9quence de : \u2022 Limiter les \u00e9changes thermiques dans ces […]<\/p>","protected":false},"author":13,"featured_media":0,"menu_order":0,"template":"","meta":[],"glossary-categories":[],"glossary-tags":[],"acf":[],"yoast_head":"\nVasoconstriction - Atoll Plong\u00e9e Marseille<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.atollplongee.com\/en\/glossary\/vasoconstriction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vasoconstriction - Atoll Plong\u00e9e Marseille\" \/>\n<meta property=\"og:description\" content=\"“La vasoconstriction des vaisseaux sanguins p\u00e9riph\u00e9riques d\u00e9signe le ph\u00e9nom\u00e8ne de r\u00e9duction du diam\u00e8tre des capillaires sanguins, r\u00e9duisant la circulation du sang vers la p\u00e9riph\u00e9rie du corps humain. Elle est due \u00e0 un r\u00e9flexe du corps humain en r\u00e9ponse \u00e0 de froides temp\u00e9ratures. Elle a pour cons\u00e9quence de : \u2022 Limiter les \u00e9changes thermiques dans ces […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.atollplongee.com\/en\/glossary\/vasoconstriction\/\" \/>\n<meta property=\"og:site_name\" content=\"Atoll Plong\u00e9e Marseille\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.atollplongee.com\/#organization\",\"name\":\"Atoll\",\"url\":\"https:\/\/www.atollplongee.com\/\",\"sameAs\":[],\"logo\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.atollplongee.com\/#logo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/www.atollplongee.com\/wp-content\/uploads\/2019\/02\/plonge\\u0301e-marseille-atoll-logo-1.png\",\"contentUrl\":\"https:\/\/www.atollplongee.com\/wp-content\/uploads\/2019\/02\/plonge\\u0301e-marseille-atoll-logo-1.png\",\"width\":167,\"height\":42,\"caption\":\"Atoll\"},\"image\":{\"@id\":\"https:\/\/www.atollplongee.com\/#logo\"}},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.atollplongee.com\/#website\",\"url\":\"https:\/\/www.atollplongee.com\/\",\"name\":\"Atoll Plong\\u00e9e Marseille\",\"description\":\"centre de plong\\u00e9e et de formation n\\u00b01 \\u00e0 Marseille\",\"publisher\":{\"@id\":\"https:\/\/www.atollplongee.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.atollplongee.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/#webpage\",\"url\":\"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/\",\"name\":\"Vasoconstriction - Atoll Plong\\u00e9e Marseille\",\"isPartOf\":{\"@id\":\"https:\/\/www.atollplongee.com\/#website\"},\"datePublished\":\"2021-03-10T15:07:51+00:00\",\"dateModified\":\"2021-03-10T15:07:51+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.atollplongee.com\/glossary\/vasoconstriction\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.atollplongee.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Vasoconstriction\"}]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Vasoconstriction - Atoll Plong\u00e9e Marseille","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.atollplongee.com\/en\/glossary\/vasoconstriction\/","og_locale":"en_US","og_type":"article","og_title":"Vasoconstriction - Atoll Plong\u00e9e Marseille","og_description":"“La vasoconstriction des vaisseaux sanguins p\u00e9riph\u00e9riques d\u00e9signe le ph\u00e9nom\u00e8ne de r\u00e9duction du diam\u00e8tre des capillaires sanguins, r\u00e9duisant la circulation du sang vers la p\u00e9riph\u00e9rie du corps humain. 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