{"id":115,"date":"2012-11-05T11:34:47","date_gmt":"2012-11-05T15:34:47","guid":{"rendered":"https:\/\/sites.owu.edu\/wolverton\/?page_id=115"},"modified":"2016-12-01T08:50:41","modified_gmt":"2016-12-01T13:50:41","slug":"membranes","status":"publish","type":"page","link":"https:\/\/sites.owu.edu\/wolverton\/teaching\/cell-bio\/membranes\/","title":{"rendered":"Membranes"},"content":{"rendered":"<p><!--:en--><\/p>\n<h2 id=\"links\">Links<\/h2>\n<p><a href=\"http:\/\/www.nature.com\/principles\/ebooks\/introduction-to-cell-biology-4570805\/4569800\">Principles Module 17<\/a><\/p>\n<p><a href=\"http:\/\/www.nature.com\/principles\/ebooks\/introduction-to-cell-biology-4570805\/4569794\">Principles Module 18<\/a><\/p>\n<p><a href=\"\/images\/membranes.pdf\">Overview slides<\/a><\/p>\n<h2 id=\"objectives\">Objectives<\/h2>\n<ul>\n<li>Describe the structure of cell membranes<\/li>\n<li>Explain how membranes function in exchange<\/li>\n<\/ul>\n<h2 id=\"keypoints\">Key points<\/h2>\n<ul>\n<li>membranes are selectively permeable and part of the sensory system<\/li>\n<li>made of phospholipids, amphipathic, form bilayer\n<ul>\n<li>allows nonpolar molecules to diffuse straight across<\/li>\n<\/ul>\n<\/li>\n<li>have proteins either attached (peripheral) or spanning (integral)\n<ul>\n<li>some act in transport, others in cell identity, others in signaling<\/li>\n<\/ul>\n<\/li>\n<li>fluidity depends on composition of membrane\n<ul>\n<li>varied sterols or degree of saturation<\/li>\n<\/ul>\n<\/li>\n<li>transport across membrane depends on concentration of solute = diffusion\n<ul>\n<li>when across membrane = osmosis<\/li>\n<li>osmoregulation<\/li>\n<\/ul>\n<\/li>\n<li>channel proteins can facillitate diffusion of a specific molecule in a specific direction<\/li>\n<li>transport may be passive (not require energy) or active<\/li>\n<li>membrane potential provides the driving force for much transport<\/li>\n<\/ul>\n<h2 id=\"in-classactivities\">In-class activities<\/h2>\n<h3 id=\"membranetransportenactment\">Membrane Transport Enactment<\/h3>\n<p>Working in groups (or groups of groups) and using your <em>selves<\/em> as carriers, pumps, and various solutes, enact the transport dynamics of both the sodium\/potassium pump and the sucrose co-transporter. Make sure you understand the <em>driving force<\/em> for transport in both of these examples.<!--:--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Links Principles Module 17 Principles Module 18 Overview slides Objectives Describe the structure of cell membranes Explain how membranes function in exchange Key points membranes are selectively permeable and part of the sensory system made of phospholipids, amphipathic, form bilayer allows nonpolar molecules to diffuse straight across have proteins either attached (peripheral) or spanning (integral) [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":0,"parent":447,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-115","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/pages\/115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/users\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/comments?post=115"}],"version-history":[{"count":1,"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/pages\/115\/revisions"}],"predecessor-version":[{"id":508,"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/pages\/115\/revisions\/508"}],"up":[{"embeddable":true,"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/pages\/447"}],"wp:attachment":[{"href":"https:\/\/sites.owu.edu\/wolverton\/wp-json\/wp\/v2\/media?parent=115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}