{"id":2190,"date":"2021-09-22T20:00:00","date_gmt":"2021-09-22T20:00:00","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=2190"},"modified":"2025-10-01T11:40:33","modified_gmt":"2025-10-01T19:40:33","slug":"usmle-step-1-question-of-the-day-lipid-transport","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport","title":{"rendered":"USMLE\u00ae Step 1 Question of the Day: Lipid Transport"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">In This Article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#The_correct_answer_to_todays_USMLE%C2%AE_Step_1_Question_is%E2%80%A6\" >The correct answer to today&#8217;s USMLE\u00ae Step 1 Question is&#8230;<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#A_Breakdown_of_triglycerides_into_fatty_acids\" >A. Breakdown of triglycerides into fatty acids<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#Incorrect_answer_explanations\" >Incorrect answer explanations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#B_Uptake_of_lipoprotein_remnants\" >B. Uptake of lipoprotein remnants<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#C_Binding_of_low_density_lipoprotein_to_its_receptors\" >C. Binding of low density lipoprotein to its receptors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#D_Conversion_of_free_cholesterol_to_cholesteryl_esters\" >D. Conversion of free cholesterol to cholesteryl esters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#E_Secretion_of_chylomicrons_into_the_lymphatics\" >E. Secretion of chylomicrons into the lymphatics<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#Main_Explanation\" >Main Explanation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#Major_Takeaway\" >Major Takeaway<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><em>Each week, Osmosis shares a USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics. Today&#8217;s case involves a 28-year-old woman with two episodes of pancreatitis over the past year.&nbsp;<\/em><\/strong><strong><em>Can you figure out the cause?<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 28-year-old woman is being evaluated by her primary care physician for recurrent&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Pancreatitis:_Clinical_practice\" target=\"_blank\" rel=\"noreferrer noopener\">pancreatitis<\/a>. The patient has had two episodes of pancreatitis over the past year. She consumes a balanced diet and does not drink alcohol. Family history is notable for&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Osteoarthritis\" target=\"_blank\" rel=\"noreferrer noopener\">osteoarthritis<\/a>&nbsp;in her father. Her temperature is 37.5\u00b0C (99.5\u00b0F), blood pressure is 121\/72 mmHg, and pulse is 64\/min. Physical examination of the skin is notable for multiple small red-yellow papules on the buttocks and shoulders. Laboratory testing reveals a serum triglyceride level of 830 mg\/dL. Which of the following best describes the function of the protein that is most likely defective in this patient\u2019s condition?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. Breakdown of triglycerides into fatty acids<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. Uptake of lipoprotein remnants<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. Binding of low-density lipoprotein to its receptors<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. Conversion of free cholesterol to cholesteryl esters<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>E. Secretion of chylomicrons into the lymphatics<\/strong>Scroll down to find the answer!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-embed-handler wp-block-embed-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Everybody loves Osmosis.org\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/kizbJZ9cdLg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em><a href=\"https:\/\/www.osmosis.org\/plans\" target=\"_blank\" rel=\"noreferrer noopener\"><u><em><strong>\u2192 Reinforce your understanding with more self-assessment items on Osmosis.<\/strong>\u00a0<\/em><\/u><\/a><\/em><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_correct_answer_to_todays_USMLE%C2%AE_Step_1_Question_is%E2%80%A6\"><\/span>The correct answer to today&#8217;s USMLE\u00ae Step 1 Question is&#8230;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_Breakdown_of_triglycerides_into_fatty_acids\"><\/span>A. Breakdown of triglycerides into fatty acids<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Before we get to the&nbsp;<strong>Main Explanation<\/strong>, let&#8217;s look at the incorrect answer explanations. Skip to the bottom if you want to see the correct answer right away!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_answer_explanations\"><\/span>Incorrect answer explanations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The incorrect answers to today&#8217;s USMLE\u00ae Step 1 Question are&#8230;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"B_Uptake_of_lipoprotein_remnants\"><\/span>B. Uptake of lipoprotein remnants<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong>&nbsp;Apolipoprotein E (ApoE) is involved in the uptake of lipoprotein remnants. An ApoE defect presents with premature&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Arterial_disease\" target=\"_blank\" rel=\"noreferrer noopener\">atherosclerosis<\/a>, xanthomas, and increased risk of developing acute coronary syndrome. Although this patient has xanthomas, it would be atypical for an ApoE defect to cause recurrent pancreatitis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Binding_of_low_density_lipoprotein_to_its_receptors\"><\/span>C. Binding of low density lipoprotein to its receptors<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong>&nbsp;Apolipoprotein B-100 mediates the binding of low density lipoproteins (LDLs) to their receptors. A defect leads to type II&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Familial_hypercholesterolemia\" target=\"_blank\" rel=\"noreferrer noopener\">familial hypercholesterolemia<\/a>, which presents with&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Arterial_disease\" target=\"_blank\" rel=\"noreferrer noopener\">atherosclerosis<\/a>, early onset of coronary artery disease, tendon xanthomas, and corneal arcus. In contrast, this patient has no signs of coronary artery disease or tendon xanthomas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"D_Conversion_of_free_cholesterol_to_cholesteryl_esters\"><\/span>D. Conversion of free cholesterol to cholesteryl esters<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong>&nbsp;A defect in lecithin-cholesterol acyltransferase (LCAT), or its cofactor apolipoprotein A-I, would impair this process. Defects in apolipoprotein A-I can lead to Tangier disease, which presents with cholesterol deposits in the liver, spleen, bone marrow, and lymphatics. Patients with Tangier disease may also present with mild triglyceridemia. In contrast, this patient has a markedly elevated triglyceride level, which favors another diagnosis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"E_Secretion_of_chylomicrons_into_the_lymphatics\"><\/span>E. Secretion of chylomicrons into the lymphatics<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Incorrect:<\/strong>&nbsp;Apolipoprotein B-48 mediates this process. A defect in this protein is seen in&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Abetalipoproteinemia\" target=\"_blank\" rel=\"noreferrer noopener\">abetalipoproteinemia<\/a>. This condition presents in infancy with fat malabsorption and failure to thrive. Patients may also develop deficiencies in fat-soluble vitamins. The patient in this vignette has none of these symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Explanation\"><\/span><strong>Main Explanation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This patient has&nbsp;<strong>type I familial&nbsp;<\/strong><strong><a href=\"https:\/\/www.osmosis.org\/learn\/Hyperlipidemia\" target=\"_blank\" rel=\"noreferrer noopener\">hyperlipidemia<\/a><\/strong>, which is most often due to a defect in<strong>&nbsp;lipoprotein lipase<\/strong>. Lipoprotein lipase is an enzyme that&nbsp;<strong>breaks down triglycerides&nbsp;<\/strong>into fatty acids and glycerol. The condition presents with&nbsp;<strong><a href=\"https:\/\/www.osmosis.org\/learn\/Pancreatitis:_Clinical_practice\" target=\"_blank\" rel=\"noreferrer noopener\">pancreatitis<\/a><\/strong>&nbsp;and&nbsp;<strong>eruptive xanthomas<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After a meal, fats are taken up by intestinal cells, packaged into&nbsp;<strong>chylomicrons,&nbsp;<\/strong>and released into the bloodstream. Capillary lipoprotein lipase breaks down chylomicrons in order to free the triglycerides, which are absorbed by nearby tissues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chylomicron remnants, which contain cholesterol and small amounts of triglyceride, then travel to the liver to deposit the leftover lipids. The liver will combine these remnants with more, newly synthesized&nbsp;<a href=\"https:\/\/www.osmosis.org\/learn\/Fatty_acid_oxidation\" target=\"_blank\" rel=\"noreferrer noopener\">fatty acids<\/a>&nbsp;and cholesterol, and it will package them together into&nbsp;<strong>very low-density lipoproteins<\/strong>&nbsp;(VLDLs).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">VLDLs are released into the blood where lipoprotein lipase breaks them down again to release triglycerides for nearby tissues to use. As triglycerides leave the VLDL, it becomes an&nbsp;<strong>intermediate density lipoprotein<\/strong>&nbsp;(IDL) and eventually a&nbsp;<strong>low density lipoprotein<\/strong>&nbsp;(LDL). LDLs are ultimately endocytosed by liver and peripheral tissue cells expressing LDL receptors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Without a functional lipoprotein lipase, the breakdown of chylomicrons and their triglyceride content is prevented, resulting in massive triglyceride accumulation within the blood with subsequent clinical consequences (e.g., recurrent pancreatitis, eruptive xanthomas).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Major_Takeaway\"><\/span><strong>Major Takeaway<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lipoprotein lipase<\/strong>&nbsp;helps<a href=\"https:\/\/www.osmosis.org\/learn\/Fatty_acid_oxidation\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;breakdown triglycerides<\/a>&nbsp;into fatty acids and glycerol so they can be absorbed by tissue. A defect in this enzyme leads to&nbsp;<strong>type I familial hyperlipidemia<\/strong>, which causes&nbsp;<strong><a href=\"https:\/\/www.osmosis.org\/learn\/Pancreatitis:_Clinical_practice\" target=\"_blank\" rel=\"noreferrer noopener\">pancreatitis<\/a><\/strong>&nbsp;and&nbsp;<strong><a href=\"https:\/\/www.osmosis.org\/learn\/Dyslipidemias:_Pathology_review\" target=\"_blank\" rel=\"noreferrer noopener\">eruptive xanthomas<\/a><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span><strong>References<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Falko, J.M. (2018) Familial chylomicronemia syndrome: A clinical guide of endocrinologists.&nbsp;<em>Endocrine Practice<\/em>. 24(8), 756-763. Doi:&nbsp;<a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30183397\/\" target=\"_blank\" rel=\"noreferrer noopener\">10.4158\/EP-2018-0157<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Regmi, M., Rehman, A. (2019) Familial hyperlipidemia type 1.&nbsp;<em>StatPearls [Internet]<\/em>. Web Address:&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK551655\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK551655\/<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>_________________________<\/strong><br><br><strong>Want more USMLE\u00ae Step 1 practice questions? Try Osmosis today! Access your&nbsp;<em><strong><a href=\"https:\/\/www.osmosis.org\/login?type=create\" target=\"_blank\" rel=\"noreferrer noopener\">free trial<\/a><\/strong><\/em>&nbsp;and find out why millions of current and future clinicians and caregivers love learning with us.<\/strong><\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.osmosis.org\/plans\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_fc9503.png\" alt=\"Osmosis ad to create an account\" class=\"wp-image-2201\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_fc9503.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/image_fc9503.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em><sub>The United States Medical Licensing Examination (USMLE\u00ae) is a joint program of the Federation of State Medical Boards (FSMB\u00ae) and National Board of Medical Examiners (NBME\u00ae). Osmosis is not affiliated with NBME nor FSMB.&nbsp;<\/sub><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Each week, Osmosis shares a USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics. Today&#8217;s case involves a 28-year-old woman with two episodes of pancreatitis over the past year.&nbsp;Can you figure out the cause? A 28-year-old woman is being evaluated by her primary care physician for recurrent&nbsp;pancreatitis. The patient has had two [&hellip;]<\/p>\n","protected":false},"author":202,"featured_media":2191,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[27,20,1369,44],"tags":[],"class_list":["post-2190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-medicine","category-exam-prep","category-step-1-questions","category-step-1"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>USMLE\u00ae Step 1 Question of the Day: Lipid Transport - Osmosis Blog<\/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.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"USMLE\u00ae Step 1 Question of the Day: Lipid Transport - Osmosis Blog\" \/>\n<meta property=\"og:description\" content=\"Each week, Osmosis shares a USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics. Today&#8217;s case involves a 28-year-old woman with two episodes of pancreatitis over the past year.&nbsp;Can you figure out the cause? A 28-year-old woman is being evaluated by her primary care physician for recurrent&nbsp;pancreatitis. The patient has had two [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\" \/>\n<meta property=\"og:site_name\" content=\"Osmosis Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-09-22T20:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-01T19:40:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/2024-09-11T140107.133.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1081\" \/>\n\t<meta property=\"og:image:height\" content=\"1081\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Marina Horiates Kerekes, MD &amp; Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-lipid-transport\"},\"author\":{\"name\":\"Marina Horiates Kerekes, MD &amp; 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Enhance your medical knowledge with this USMLE\u00ae Step\u2026","rel":"","context":"In &quot;Allopathic Medicine (MD)&quot;","block_context":{"text":"Allopathic Medicine (MD)","link":"https:\/\/www.osmosis.org\/blog\/category\/medicine"},"img":{"alt_text":"","src":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/usmle-step-2-ck-question-of-the-day-ascites.webp","width":350,"height":200,"srcset":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/usmle-step-2-ck-question-of-the-day-ascites.webp 1x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/usmle-step-2-ck-question-of-the-day-ascites.webp 1.5x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/usmle-step-2-ck-question-of-the-day-ascites.webp 2x"},"classes":[]},{"id":3661,"url":"https:\/\/www.osmosis.org\/blog\/usmle-step-1-question-of-the-day-dizziness-episodes","url_meta":{"origin":2190,"position":5},"title":"USMLE\u00ae Step 1 Question of the Day: Dizziness Episodes","author":"Marina Horiates Kerekes, MD &amp; Team","date":"November 24, 2021","format":false,"excerpt":"Each week, Osmosis shares a USMLE\u00ae Step 1-style practice question to test your knowledge of medical topics. Today's case involves a 60-year-old woman with episodes of dizziness for the past month. The episodes usually occur when she gets up from bed, gets up from a seated position, or turns her\u2026","rel":"","context":"In &quot;Allopathic Medicine (MD)&quot;","block_context":{"text":"Allopathic Medicine (MD)","link":"https:\/\/www.osmosis.org\/blog\/category\/medicine"},"img":{"alt_text":"USMLE\u00ae Step 1 Question of the Day: Dizziness Episodes","src":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/2024-09-19T114818.288.webp","width":350,"height":200,"srcset":"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/2024-09-19T114818.288.webp 1x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/2024-09-19T114818.288.webp 1.5x, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2024\/09\/2024-09-19T114818.288.webp 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/2190","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/users\/202"}],"replies":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/comments?post=2190"}],"version-history":[{"count":2,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/2190\/revisions"}],"predecessor-version":[{"id":6727,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/posts\/2190\/revisions\/6727"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/media\/2191"}],"wp:attachment":[{"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/media?parent=2190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/categories?post=2190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.osmosis.org\/blog\/wp-json\/wp\/v2\/tags?post=2190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}