{"id":436,"date":"2017-05-16T17:51:49","date_gmt":"2017-05-16T20:51:49","guid":{"rendered":"http:\/\/en-mol.icb.usp.br\/?page_id=436"},"modified":"2026-03-22T17:32:22","modified_gmt":"2026-03-22T20:32:22","slug":"1-19-basic-concepts","status":"publish","type":"page","link":"https:\/\/mol-en.icb.usp.br\/index.php\/1-19-basic-concepts\/","title":{"rendered":"1-19 Basic concepts"},"content":{"rendered":"<div class=\"su-row\">\n<div class=\"su-column su-column-size-1-1\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><strong>REFLECTING ON 3-DIMENSIONS &#8211; 7<\/strong> <\/div><\/div>\n<\/div>\n<div class=\"su-row\">\n<div class=\"su-column su-column-size-1-2\"><div class=\"su-column-inner su-u-clearfix su-u-trim\"><strong>How a cell is seen after being sectioned at different levels.<\/strong><\/p>\n<p>Follow this sequence of drawings when thin sections are made at different levels of a cell.<br \/>\nAll sections show parts of their cytoplasm, one section shows only the cytoplasm, another shows a nucleus without a nucleolus, then a nucleus with a nucleolus.<br \/>\nIn the last drawing at the right, only a cap of the nucleus is present in the section, and is seen as a &#8220;faded&#8221; or an &#8220;out-of-focus&#8221; nucleus.<br \/>\nThis happens because the sections are usually cut randomly, at different levels of the cells and this results in a diversity of images of a given structure as its sections are observed under a microscope.<\/p>\n<\/div><\/div>\n<div class=\"su-column su-column-size-1-2\"><div class=\"su-column-inner su-u-clearfix su-u-trim\">\n<div>\n<div class=\"image-container\">\n<div class=\"extra\">\n<a href=\"javascript:void(0)\"><img decoding=\"async\" src=\" https:\/\/mol-en.icb.usp.br\/wp-content\/uploads\/1-19.gif \" onmouseover=\"this.src=' https:\/\/mol-en.icb.usp.br\/wp-content\/uploads\/1-19MO.gif'\" onmouseout=\"this.src=' https:\/\/mol-en.icb.usp.br\/wp-content\/uploads\/1-19.gif'\" \/><\/a><\/div>\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/mol-en.icb.usp.br\/wp-content\/uploads\/mouse-1.gif\"\/><\/a><br \/>\n<strong>Desktops and notebooks<\/strong>: Place the cursor over the figure to access another image.<br \/>\n<strong>Touchscreens<\/strong>: Click on the figure to access another image. Click outside of the figure to return to the first image.<\/p>\n<p><a href=https:\/\/mol-en.icb.usp.br\/index.php\/1-20-basic-concepts\/\">NEXT PAGE<\/a><\/p>\n<p><a href=\"https:\/\/mol-en.icb.usp.br\/index.php\/1-18-basic-concepts\/\">PREVIOUS PAGE\u00a0<\/a><\/p>\n<p><a href=\"https:\/\/mol-en.icb.usp.br\/index.php\/1-0-basic-concepts\/\">MENU OF THIS CHAPTER<\/a><\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-436","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/comments?post=436"}],"version-history":[{"count":29,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/436\/revisions"}],"predecessor-version":[{"id":21158,"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/pages\/436\/revisions\/21158"}],"wp:attachment":[{"href":"https:\/\/mol-en.icb.usp.br\/index.php\/wp-json\/wp\/v2\/media?parent=436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}