{"id":8953,"date":"2025-12-03T00:01:57","date_gmt":"2025-12-03T08:01:57","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=8953"},"modified":"2026-07-10T13:56:45","modified_gmt":"2026-07-10T21:56:45","slug":"nclex-question-of-the-day-gas-exchange","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-gas-exchange","title":{"rendered":"NCLEX-RN\u00ae Question of the Day: Gas exchange"},"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\/nclex-question-of-the-day-gas-exchange\/#The_correct_answer_to_todays_NCLEX%C2%AE_Question_is%E2%80%A6\" >The correct answer to today&#8217;s NCLEX\u00ae Question is&#8230;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/nclex-question-of-the-day-gas-exchange\/#Main_Takeaway\" >Main Takeaway<\/a><\/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\/nclex-question-of-the-day-gas-exchange\/#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\/nclex-question-of-the-day-gas-exchange\/#Want_to_learn_more_about_this_topic\" >Want to learn more about this topic?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><em>Today&#8217;s NCLEX-RN\u00ae question of the day focuses on gas exchange. Do you know the answer? Let&#8217;s find out!<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The nursing instructor has provided education to a student nurse about <strong>gas exchange.<\/strong> Which <strong>statement <\/strong>by the student nurse <strong>indicates the teaching was<\/strong> <strong>successful<\/strong>?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A. \u201cDuring exhalation, carbon dioxide moves into the blood from the alveoli, and oxygen moves into the alveolar sacs.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. \u201cDuring inhalation, oxygen moves from the alveoli into the blood, while carbon dioxide moves into the alveolar sacs to be exhaled.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u201cWith each inhalation, carbon dioxide and oxygen move into the blood to be circulated through the body.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. \u201cWith each exhalation, oxygen moves from the blood into the alveolar sacs and circulates in the lungs.\u201d<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Scroll down for the correct answer!<\/em><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Learn with Osmosis\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/iDxHtjjCMbU?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<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_correct_answer_to_todays_NCLEX%C2%AE_Question_is%E2%80%A6\"><\/span>The correct answer to today&#8217;s NCLEX\u00ae Question is&#8230;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B. \u201cDuring inhalation, oxygen moves from the alveoli into the blood, while carbon dioxide moves into the alveolar sacs to be exhaled.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>Alveoli <\/strong>are tiny air-filled sacs where most <strong>gas exchange<\/strong> occurs. As we breathe, inhaled <strong>oxygen moves from the alveolar sacs into the blood<\/strong>, while <strong>carbon dioxide moves from the blood into the alveolar sacs<\/strong> to be exhaled.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Main_Takeaway\"><\/span>Main Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The respiratory tract<\/strong> can be divided into <strong>two regions: the upper respiratory tract and lower respiratory tract.<\/strong> The <strong>upper respiratory tract<\/strong> includes the <strong>nose, nasal cavity, the oral cavity, pharynx, epiglottis, larynx, and the upper part of the trachea;<\/strong> while the <strong>lower respiratory tract<\/strong> includes the <strong>lower part of the trachea, and the lungs containing the bronchi, bronchioles, alveolar ducts, and finally the alveoli.<\/strong> <strong>Alveoli<\/strong> are <strong>tiny air-filled sacs where most gas exchange occurs<\/strong>, so as we breathe, the <strong>inhaled oxygen moves from the alveolar sacs into the blood<\/strong>, while the <strong>carbon dioxide moves from the blood into the alveolar sacs to be exhaled.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"734\" height=\"356\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/12\/image_7cfd10.png\" alt=\"Illustration titled **\u201cRespiratory Tract.\u201d**\n\n* On the left, a human figure is shown with the respiratory system highlighted. A dashed horizontal line divides the upper and lower portions, with focus on the **lower respiratory tract** below the line.\n* In the center, a labeled diagram of the **lungs** shows branching airways: **lower trachea**, **bronchi**, **bronchioles**, **alveolar ducts**, and **alveoli**.\n* On the right, small illustrations show:\n\n  1. A person inhaling oxygen and exhaling carbon dioxide.\n  2. A close-up of a **lung alveolus**, depicting gas exchange \u2014 oxygen (O\u2082) entering the blood and carbon dioxide (CO\u2082) leaving through the alveolar membrane.\" class=\"wp-image-8956\" style=\"width:506px;height:auto\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/12\/image_7cfd10.png 734w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/12\/image_7cfd10.png?resize=300,146 300w\" sizes=\"auto, (max-width: 734px) 100vw, 734px\" \/><\/figure>\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\"><strong>A. \u201cDuring exhalation, carbon dioxide moves into the blood from the alveoli, and oxygen moves into the alveolar sacs.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:Carbon dioxide does not move into the blood from the alveoli during exhalation<\/strong> and <strong>oxygen does not move into the alveolar sacs.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C. \u201cWith each inhalation, carbon dioxide and oxygen move into the blood to be circulated through the body.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>Carbon dioxide and oxygen do not move into the blood to be circulated through the body during inhalation.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D. \u201cWith each exhalation, oxygen moves from the blood into the alveolar sacs and circulates in the lungs.\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rationale:<\/strong> <strong>Oxygen does not move into the alveolar sacs to be circulated through the lungs during exhalation.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Want_to_learn_more_about_this_topic\"><\/span>Want to learn more about this topic?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Watch the Osmosis video: <a href=\"https:\/\/www.osmosis.org\/learn\/Gas_exchange_in_the_lungs,_blood_and_tissues\">Gas exchange in the lungs, blood and tissues<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><a href=\"https:\/\/www.osmosis.org\/create\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png?w=700\" alt=\"\" class=\"wp-image-5083\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong><em>Get your\u00a0<a href=\"https:\/\/www.osmosis.org\/create\" target=\"_blank\" rel=\"noreferrer noopener\">free trial<\/a>\u00a0and find out why millions of current and future clinicians and caregivers love learning by Osmosis.<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Explore how gas exchange occurs in the lungs. Understand the movement of oxygen into the blood and carbon dioxide out during breathing for effective respiratory care.<\/p>\n","protected":false},"author":279,"featured_media":8957,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[20,29,1367,1366,32],"tags":[2356,2360,2363,2357,2362,2361,244,245,2358,2366,2364,2365,337,2367,2359],"class_list":["post-8953","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exam-prep","category-nclex","category-nclex-rn","category-questions","category-nursing","tag-alveoli","tag-carbon-dioxide-removal","tag-exhalation","tag-gas-exchange","tag-inhalation","tag-lung-function","tag-nclex-rn","tag-nursing-education","tag-oxygen-transport","tag-oxygen-carbon-dioxide-exchange","tag-pulmonary-physiology","tag-respiratory-anatomy","tag-respiratory-care","tag-respiratory-nursing","tag-respiratory-system"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCLEX-RN\u00ae Question of the Day: Gas exchange - 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\/nclex-question-of-the-day-gas-exchange\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCLEX-RN\u00ae Question of the Day: Gas exchange - Osmosis Blog\" \/>\n<meta property=\"og:description\" content=\"Explore how gas exchange occurs in the lungs. 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