{"id":2001,"date":"2023-11-21T12:26:43","date_gmt":"2023-11-21T11:26:43","guid":{"rendered":"https:\/\/svt-dalaine.fr\/svt\/?page_id=2001"},"modified":"2026-01-26T17:11:51","modified_gmt":"2026-01-26T16:11:51","slug":"sv-c-3-membranes-et-echanges","status":"publish","type":"page","link":"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/","title":{"rendered":"SV-C-3 Membranes et \u00e9changes"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2001\" class=\"elementor elementor-2001\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7c12ba5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7c12ba5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-83a7da6\" data-id=\"83a7da6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e464105 elementor-widget elementor-widget-image\" data-id=\"e464105\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"183\" src=\"https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-1024x293.png\" class=\"attachment-large size-large wp-image-2033\" alt=\"\" srcset=\"https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-1024x293.png 1024w, https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-300x86.png 300w, https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-768x220.png 768w, https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-1536x439.png 1536w, https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-360x103.png 360w, https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1.png 1891w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6b2197a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6b2197a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bc45908\" data-id=\"bc45908\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cf1dd62 elementor-widget elementor-widget-text-editor\" data-id=\"cf1dd62\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Extrait du B.O.<\/p><p>Les propri\u00e9t\u00e9s de fluidit\u00e9, de perm\u00e9abilit\u00e9 s\u00e9lective, de sp\u00e9cificit\u00e9 reposent sur l\u2019organisation de la membrane.<\/p><p>Les membranes cellulaires sont des associations non covalentes de prot\u00e9ines et de lipides, parfois glycosyl\u00e9s, assembl\u00e9s en bicouches.<\/p><p>\u00a0L&#8217;eau, les solut\u00e9s neutres ou charg\u00e9s et les gaz dissous peuvent traverser les membranes.<\/p><p>La perm\u00e9abilit\u00e9 de la membrane vis-\u00e0-vis d\u2019une substance chimique d\u00e9pend de ses propri\u00e9t\u00e9s physicochimiques et de celles de la substance consid\u00e9r\u00e9e.<\/p><p>Ces \u00e9changes transmembranaires sont r\u00e9gis par les diff\u00e9rences de potentiel \u00e9lectro-chimique.<\/p><p>Les flux de solut\u00e9s s\u2018effectuent dans le sens des potentiels \u00e9lectro-chimique d\u00e9croissants par transport passif simple ou facilit\u00e9 ou dans le sens inverse par transport actif primaire ou secondaire (couplages \u00e9nerg\u00e9tiques).<\/p><p>Les flux transmembranaires sont une fonction lin\u00e9aire (diffusion simple) ou une fonction pr\u00e9sentant un plateau de saturation (\u00e9change assist\u00e9 par un transporteur) de la concentration en mol\u00e9cule transport\u00e9e.<\/p><p>Des flux transmembranaires d&#8217;ions sont \u00e0 l\u2019origine d&#8217;un potentiel \u00e9lectrique appel\u00e9 potentiel de membrane.<\/p><p>Des transferts de mati\u00e8re entre les compartiments et avec le milieu extracellulaire (endocytose et exocytose) sont r\u00e9alis\u00e9s par l\u2019interm\u00e9diaire de v\u00e9sicules. Le bourgeonnement et la fusion des v\u00e9sicules reposent sur les propri\u00e9t\u00e9s des membranes et l\u2019implication des prot\u00e9ines. Le transport et le guidage des v\u00e9sicules mettent en jeu le cytosquelette.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Extrait du B.O. Les propri\u00e9t\u00e9s de fluidit\u00e9, de perm\u00e9abilit\u00e9 s\u00e9lective, de sp\u00e9cificit\u00e9 reposent sur l\u2019organisation de la membrane. Les membranes cellulaires sont des associations non covalentes de prot\u00e9ines et de lipides, parfois glycosyl\u00e9s, assembl\u00e9s en bicouches. \u00a0L&#8217;eau, les solut\u00e9s neutres&hellip;&nbsp;<a href=\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\" class=\"more-link\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2001","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.9.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SV-C-3 Membranes et \u00e9changes - Bienvenue sur le site de Sciences de la Vie et de la Terre<\/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:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SV-C-3 Membranes et \u00e9changes - Bienvenue sur le site de Sciences de la Vie et de la Terre\" \/>\n<meta property=\"og:description\" content=\"Extrait du B.O. Les propri\u00e9t\u00e9s de fluidit\u00e9, de perm\u00e9abilit\u00e9 s\u00e9lective, de sp\u00e9cificit\u00e9 reposent sur l\u2019organisation de la membrane. Les membranes cellulaires sont des associations non covalentes de prot\u00e9ines et de lipides, parfois glycosyl\u00e9s, assembl\u00e9s en bicouches. \u00a0L&#8217;eau, les solut\u00e9s neutres&hellip;&nbsp;Lire la suite\" \/>\n<meta property=\"og:url\" content=\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\" \/>\n<meta property=\"og:site_name\" content=\"Bienvenue sur le site de Sciences de la Vie et de la Terre\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-26T16:11:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/svt-dalaine.fr\/svt\/wp-content\/uploads\/2023\/11\/Image1-1024x293.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\",\"url\":\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\",\"name\":\"SV-C-3 Membranes et \u00e9changes - Bienvenue sur le site de Sciences de la Vie et de la Terre\",\"isPartOf\":{\"@id\":\"https:\/\/svt-dalaine.fr\/svt\/#website\"},\"datePublished\":\"2023-11-21T11:26:43+00:00\",\"dateModified\":\"2026-01-26T16:11:51+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/svt-dalaine.fr\/svt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"SV-C-3 Membranes et \u00e9changes\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/svt-dalaine.fr\/svt\/#website\",\"url\":\"https:\/\/svt-dalaine.fr\/svt\/\",\"name\":\"Bienvenue sur le site de Sciences de la Vie et de la Terre\",\"description\":\"Ressources en SVT de St\u00e9phanie Dalaine, professeure agr\u00e9g\u00e9e exer\u00e7ant en BCPST1 ENCPB\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/svt-dalaine.fr\/svt\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"SV-C-3 Membranes et \u00e9changes - Bienvenue sur le site de Sciences de la Vie et de la Terre","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:\/\/svt-dalaine.fr\/svt\/sv-c-3-membranes-et-echanges\/","og_locale":"fr_FR","og_type":"article","og_title":"SV-C-3 Membranes et \u00e9changes - Bienvenue sur le site de Sciences de la Vie et de la Terre","og_description":"Extrait du B.O. Les propri\u00e9t\u00e9s de fluidit\u00e9, de perm\u00e9abilit\u00e9 s\u00e9lective, de sp\u00e9cificit\u00e9 reposent sur l\u2019organisation de la membrane. 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