{"id":7325,"date":"2026-10-30T08:13:27","date_gmt":"2026-10-30T08:13:27","guid":{"rendered":"https:\/\/ksquareinstitute.in\/blog\/?p=7325"},"modified":"2026-10-30T08:13:28","modified_gmt":"2026-10-30T08:13:28","slug":"breathing-and-exchange-of-gases-neet-pyq-analysis","status":"publish","type":"post","link":"https:\/\/ksquareinstitute.in\/blog\/breathing-and-exchange-of-gases-neet-pyq-analysis\/","title":{"rendered":"Breathing and Exchange of Gases NEET PYQ Analysis: Volumes, Transport and Regulation"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> A breathing and exchange of gases NEET PYQ analysis shows that NTA asks about one to two questions a year from this chapter, and the single most repeated topic is respiratory volumes and capacities (asked in 2019, 2020, 2022, 2023, 2024 and 2026). The other repeated areas are the transport of O\u2082 and CO\u2082 with the oxygen dissociation curve, partial pressures, the mechanism of breathing, regulation of respiration, respiratory organs in different animals, and disorders such as asthma and emphysema.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"434\" src=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude-1024x434.jpg\" alt=\"Breathing and exchange of gases NEET PYQ analysis showing frosty breath and an oxygen canister on a high mountain pass\" class=\"wp-image-7326\" srcset=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude-1024x434.jpg 1024w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude-300x127.jpg 300w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude-768x326.jpg 768w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude-1536x652.jpg 1536w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/10\/Breathing-and-Exchange-of-Gases-NEET-PYQ-Analysis-Altitude.jpg 1584w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This guide breaks down what NTA repeats, the tables to memorise and PYQ-pattern questions with answers. For the full Zoology physiology plan, see our <a href=\"https:\/\/ksquareinstitute.in\/blog\/human-physiology-for-neet-2027\">human physiology guide for NEET<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Want to test yourself first? <a href=\"https:\/\/ksquareinstitute.com\/questions\/neet-previous-year-questions\/biology\/breathing-and-exchange-of-gases\/questions\/\" target=\"_blank\" rel=\"noopener\">Solve the Breathing and Exchange of Gases PYQs<\/a> for free, then use this guide to fix the gaps.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#why-this-chapter-is-reliable-marks\">Why This Chapter Is Reliable Marks<\/a><\/li><li><a href=\"#breathing-and-exchange-of-gases-neet-pyq-analysis-what-nta-repeats\">Breathing and Exchange of Gases NEET PYQ Analysis: What NTA Repeats<\/a><\/li><li><a href=\"#respiratory-organs-in-animals\">Respiratory Organs in Animals<\/a><\/li><li><a href=\"#the-human-respiratory-system\">The Human Respiratory System<\/a><\/li><li><a href=\"#mechanism-of-breathing\">Mechanism of Breathing<\/a><\/li><li><a href=\"#respiratory-volumes-and-capacities-the-most-tested-table\">Respiratory Volumes and Capacities: The Most Tested Table<\/a><\/li><li><a href=\"#exchange-of-gases\">Exchange of Gases<\/a><\/li><li><a href=\"#transport-of-gases\">Transport of Gases<\/a><\/li><li><a href=\"#regulation-of-respiration\">Regulation of Respiration<\/a><\/li><li><a href=\"#disorders-of-the-respiratory-system\">Disorders of the Respiratory System<\/a><\/li><li><a href=\"#worked-pyq-pattern-questions\">Worked PYQ-Pattern Questions<\/a><\/li><li><a href=\"#common-traps-in-this-chapter\">Common Traps in This Chapter<\/a><\/li><li><a href=\"#practise-every-breathing-and-exchange-of-gases-pyq\">Practise Every Breathing and Exchange of Gases PYQ<\/a><\/li><li><a href=\"#conclusion\">Conclusion<\/a><\/li><li><a href=\"#\u2753-faq\">\u2753 FAQ<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 id=\"why-this-chapter-is-reliable-marks\" class=\"wp-block-heading\">Why This Chapter Is Reliable Marks<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Breathing questions are mostly numbers: lung volumes in mL, partial pressures in mm Hg and transport percentages. Learn three tables and you can answer almost every past question. For chapter notes, use our <a href=\"https:\/\/ksquareinstitute.in\/blog\/breathing-and-exchange-of-gases-class-11\">Breathing chapter notes<\/a>, and to see where it sits among other chapters, check the <a href=\"https:\/\/ksquareinstitute.in\/blog\/neet-2027-syllabus-chapter-weightage\">NEET 2027 chapter weightage<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gas transport in blood links straight to our <a href=\"https:\/\/ksquareinstitute.in\/blog\/body-fluids-circulation-neet-pyq-analysis\">Body Fluids PYQ analysis<\/a>, and respiratory organs in different animals come from our <a href=\"https:\/\/ksquareinstitute.in\/blog\/animal-kingdom-neet-pyq-analysis\">Animal Kingdom PYQ analysis<\/a>. For a quick warm-up, try these <a href=\"https:\/\/ksquareinstitute.in\/blog\/top-5-human-physiology-questions\">five quick physiology questions<\/a>.<\/p>\n\n\n\n<h2 id=\"breathing-and-exchange-of-gases-neet-pyq-analysis-what-nta-repeats\" class=\"wp-block-heading\">Breathing and Exchange of Gases NEET PYQ Analysis: What NTA Repeats<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When you sort the past NEET biology PYQs from this chapter, five question types cover nearly everything.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Question type<\/th><th>Frequency<\/th><th>What it tests<\/th><\/tr><\/thead><tbody><tr><td>Respiratory volumes and capacities<\/td><td>Most frequent<\/td><td>TV, IRV, ERV, RV and the capacities built from them<\/td><\/tr><tr><td>Transport of gases<\/td><td>Very frequent<\/td><td>O\u2082 and CO\u2082 transport percentages, oxygen dissociation curve, factors favouring oxyhaemoglobin<\/td><\/tr><tr><td>Exchange of gases<\/td><td>Regular<\/td><td>Partial pressures, diffusion membrane, solubility of CO\u2082<\/td><\/tr><tr><td>Mechanism and regulation of breathing<\/td><td>Regular<\/td><td>Diaphragm and intercostal muscles, respiratory centres<\/td><\/tr><tr><td>Respiratory organs and disorders<\/td><td>Regular<\/td><td>Organs in different animals, asthma, emphysema, occupational disorders<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"respiratory-organs-in-animals\" class=\"wp-block-heading\">Respiratory Organs in Animals<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Animals<\/th><th>Respiratory organ or method<\/th><\/tr><\/thead><tbody><tr><td>Sponges, coelenterates, flatworms<\/td><td>Simple diffusion over the whole body surface<\/td><\/tr><tr><td>Earthworms<\/td><td>Moist cuticle<\/td><\/tr><tr><td>Insects<\/td><td>Network of tracheal tubes<\/td><\/tr><tr><td>Most aquatic arthropods and molluscs<\/td><td>Gills (branchial respiration)<\/td><\/tr><tr><td>Fishes<\/td><td>Gills<\/td><\/tr><tr><td>Amphibians (frogs)<\/td><td>Lungs, and also through moist skin (cutaneous respiration)<\/td><\/tr><tr><td>Reptiles, birds, mammals<\/td><td>Lungs (pulmonary respiration)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This table was asked twice in 2026.<\/p>\n\n\n\n<h2 id=\"the-human-respiratory-system\" class=\"wp-block-heading\">The Human Respiratory System<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The air path is: external nostrils \u2192 nasal chamber \u2192 pharynx (a common passage for food and air) \u2192 larynx (the sound box) \u2192 trachea \u2192 primary, secondary and tertiary bronchi \u2192 bronchioles \u2192 terminal bronchioles \u2192 alveoli.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The trachea divides into the right and left primary bronchi at the level of the <strong>5th thoracic vertebra<\/strong>.<\/li>\n\n\n\n<li>The trachea, bronchi and initial bronchioles are supported by <strong>incomplete cartilaginous rings<\/strong>.<\/li>\n\n\n\n<li>The <strong>epiglottis<\/strong>, a thin elastic cartilaginous flap, covers the glottis during swallowing so food does not enter the larynx.<\/li>\n\n\n\n<li>The lungs are covered by a double-layered <strong>pleura<\/strong> with pleural fluid between the layers, which reduces friction.<\/li>\n\n\n\n<li>The <strong>conducting part<\/strong> runs from the external nostrils to the terminal bronchioles; it carries, cleans, humidifies and warms the air. The <strong>respiratory or exchange part<\/strong> is the alveoli and their ducts.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The steps of respiration, asked in 2023 and 2026, are: breathing (pulmonary ventilation), diffusion of gases across the alveolar membrane, transport of gases by the blood, diffusion between blood and tissues, and use of O\u2082 by cells (cellular respiration).<\/p>\n\n\n\n<h2 id=\"mechanism-of-breathing\" class=\"wp-block-heading\">Mechanism of Breathing<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Step<\/th><th>Muscles<\/th><th>Effect<\/th><\/tr><\/thead><tbody><tr><td>Inspiration<\/td><td>Diaphragm contracts (increases volume front to back); external intercostal muscles contract and lift the ribs and sternum (increases volume top to bottom)<\/td><td>Lung pressure falls below atmospheric pressure, so air flows in<\/td><\/tr><tr><td>Expiration<\/td><td>Diaphragm and intercostal muscles relax; for forceful breathing, abdominal and internal intercostal muscles help<\/td><td>Lung pressure rises above atmospheric pressure, so air flows out<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A healthy adult breathes <strong>12\u201316 times a minute<\/strong>. Breathing volumes are measured with a <strong>spirometer<\/strong>.<\/p>\n\n\n\n<h2 id=\"respiratory-volumes-and-capacities-the-most-tested-table\" class=\"wp-block-heading\">Respiratory Volumes and Capacities: The Most Tested Table<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Volume<\/th><th>Meaning<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Tidal volume (TV)<\/td><td>Air inspired or expired in a normal breath<\/td><td>About 500 mL (6000\u20138000 mL per minute)<\/td><\/tr><tr><td>Inspiratory reserve volume (IRV)<\/td><td>Extra air that can be inspired by a forcible inspiration<\/td><td>2500\u20133000 mL<\/td><\/tr><tr><td>Expiratory reserve volume (ERV)<\/td><td>Extra air that can be expired by a forcible expiration<\/td><td>1000\u20131100 mL<\/td><\/tr><tr><td>Residual volume (RV)<\/td><td>Air left in the lungs even after a forcible expiration<\/td><td>1100\u20131200 mL<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Capacity<\/th><th>Formula<\/th><\/tr><\/thead><tbody><tr><td>Inspiratory capacity (IC)<\/td><td>TV + IRV<\/td><\/tr><tr><td>Expiratory capacity (EC)<\/td><td>TV + ERV<\/td><\/tr><tr><td>Functional residual capacity (FRC)<\/td><td>ERV + RV<\/td><\/tr><tr><td>Vital capacity (VC)<\/td><td>IRV + TV + ERV<\/td><\/tr><tr><td>Total lung capacity (TLC)<\/td><td>VC + RV<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Most questions give a few values and ask for a capacity, or ask which capacity includes the residual volume. Remember that <strong>only FRC and TLC include RV<\/strong>.<\/p>\n\n\n\n<h2 id=\"exchange-of-gases\" class=\"wp-block-heading\">Exchange of Gases<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Gas<\/th><th>Atmospheric air<\/th><th>Alveoli<\/th><th>Deoxygenated blood<\/th><th>Oxygenated blood<\/th><th>Tissues<\/th><\/tr><\/thead><tbody><tr><td>pO\u2082 (mm Hg)<\/td><td>159<\/td><td>104<\/td><td>40<\/td><td>95<\/td><td>40<\/td><\/tr><tr><td>pCO\u2082 (mm Hg)<\/td><td>0.3<\/td><td>40<\/td><td>45<\/td><td>40<\/td><td>45<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gases move from higher to lower partial pressure: O\u2082 from alveoli to blood to tissues, and CO\u2082 the other way.<\/li>\n\n\n\n<li>CO\u2082 is <strong>20\u201325 times more soluble<\/strong> than O\u2082, so much more CO\u2082 diffuses per unit difference in partial pressure.<\/li>\n\n\n\n<li>The diffusion membrane has three layers: the thin squamous epithelium of the alveoli, the endothelium of the alveolar capillaries, and the basement substance between them. Its total thickness is much less than a millimetre.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">At high altitude, atmospheric pO\u2082 is lower, so less O\u2082 binds to haemoglobin in the lungs. This is the basis of altitude sickness, asked in 2023.<\/p>\n\n\n\n<h2 id=\"transport-of-gases\" class=\"wp-block-heading\">Transport of Gases<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Gas<\/th><th>How it is carried<\/th><\/tr><\/thead><tbody><tr><td>O\u2082<\/td><td>About <strong>97% by RBCs<\/strong> as oxyhaemoglobin; about 3% dissolved in plasma<\/td><\/tr><tr><td>CO\u2082<\/td><td>About <strong>70% as bicarbonate<\/strong>; 20\u201325% by RBCs as carbamino-haemoglobin; about 7% dissolved in plasma<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Each haemoglobin molecule can carry up to <strong>four O\u2082 molecules<\/strong>.<\/li>\n\n\n\n<li>The <strong>oxygen dissociation curve<\/strong> (percentage saturation of haemoglobin against pO\u2082) is <strong>sigmoid<\/strong>.<\/li>\n\n\n\n<li><strong>Oxyhaemoglobin forms<\/strong> in the alveoli, where conditions are: high pO\u2082, low pCO\u2082, low H\u207a concentration (higher pH) and lower temperature. In the tissues, the opposite conditions make oxygen dissociate.<\/li>\n\n\n\n<li>Every 100 mL of oxygenated blood delivers about <strong>5 mL of O\u2082<\/strong> to the tissues, and every 100 mL of deoxygenated blood delivers about <strong>4 mL of CO\u2082<\/strong> to the alveoli.<\/li>\n\n\n\n<li><strong>Carbonic anhydrase<\/strong>, found mainly in RBCs, speeds up CO\u2082 + H\u2082O \u21cc H\u2082CO\u2083 \u21cc HCO\u2083\u207b + H\u207a in both directions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The factors favouring oxyhaemoglobin formation were asked in 2024.<\/p>\n\n\n\n<h2 id=\"regulation-of-respiration\" class=\"wp-block-heading\">Regulation of Respiration<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Centre or receptor<\/th><th>Location<\/th><th>Role<\/th><\/tr><\/thead><tbody><tr><td>Respiratory rhythm centre<\/td><td>Medulla<\/td><td>Mainly responsible for the rhythm of breathing<\/td><\/tr><tr><td><strong>Pneumotaxic centre<\/strong><\/td><td>Pons<\/td><td>Moderates the rhythm centre; can shorten inspiration and change the breathing rate<\/td><\/tr><tr><td>Chemosensitive area<\/td><td>Next to the rhythm centre<\/td><td>Highly sensitive to CO\u2082 and H\u207a<\/td><\/tr><tr><td>Receptors<\/td><td>Aortic arch and carotid artery<\/td><td>Detect changes in CO\u2082 and H\u207a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The role of O\u2082 in regulating breathing is quite insignificant; CO\u2082 and H\u207a are the main signals.<\/p>\n\n\n\n<h2 id=\"disorders-of-the-respiratory-system\" class=\"wp-block-heading\">Disorders of the Respiratory System<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Disorder<\/th><th>Feature<\/th><\/tr><\/thead><tbody><tr><td>Asthma<\/td><td>Difficulty in breathing and wheezing, due to inflammation of the bronchi and bronchioles<\/td><\/tr><tr><td>Emphysema<\/td><td>Chronic disorder in which the alveolar walls are damaged, reducing the respiratory surface; cigarette smoking is a major cause<\/td><\/tr><tr><td>Occupational respiratory disorders<\/td><td>Long exposure to dust in grinding or stone-breaking causes inflammation and fibrosis of the lungs; workers should wear protective masks<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"worked-pyq-pattern-questions\" class=\"wp-block-heading\">Worked PYQ-Pattern Questions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q1. If TV = 500 mL, IRV = 2500 mL and ERV = 1000 mL, the vital capacity is:<\/strong> (a) 3000 mL (b) 3500 mL (c) 4000 mL (d) 5100 mL<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: (c) 4000 mL,<\/strong> because VC = IRV + TV + ERV.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q2. Which of these capacities includes the residual volume?<\/strong> (a) Vital capacity (b) Inspiratory capacity (c) Functional residual capacity (d) Expiratory capacity<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: (c) Functional residual capacity<\/strong> (ERV + RV). Total lung capacity also includes RV.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q3. What is the pO\u2082 of alveolar air?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: About 104 mm Hg.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q4. Most CO\u2082 is carried in the blood as:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: Bicarbonate, about 70%.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q5. Which conditions favour the formation of oxyhaemoglobin in the alveoli?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: High pO\u2082, low pCO\u2082, low H\u207a concentration and lower temperature.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q6. The pneumotaxic centre is located in the:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: Pons.<\/strong> The rhythm centre is in the medulla.<\/p>\n\n\n\n<h2 id=\"common-traps-in-this-chapter\" class=\"wp-block-heading\">Common Traps in This Chapter<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Including RV in vital capacity<\/li>\n\n\n\n<li>Writing 95 mm Hg as the alveolar pO\u2082 (that is oxygenated blood; alveoli are 104)<\/li>\n\n\n\n<li>Saying most CO\u2082 travels as carbamino-haemoglobin (most is bicarbonate)<\/li>\n\n\n\n<li>Saying high pCO\u2082 or high temperature favours oxyhaemoglobin formation<\/li>\n\n\n\n<li>Placing the pneumotaxic centre in the medulla<\/li>\n\n\n\n<li>Saying O\u2082 is the main chemical signal regulating breathing<\/li>\n<\/ul>\n\n\n\n<h2 id=\"practise-every-breathing-and-exchange-of-gases-pyq\" class=\"wp-block-heading\">Practise Every Breathing and Exchange of Gases PYQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This breathing and exchange of gases NEET PYQ analysis shows you where the marks are. Solving real past questions makes the volumes and pressures automatic. Every previous year question from this chapter is available chapter-wise, free:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 <strong><a href=\"https:\/\/ksquareinstitute.com\/questions\/neet-previous-year-questions\/biology\/breathing-and-exchange-of-gases\/\" target=\"_blank\" rel=\"noopener\">Solve all Breathing and Exchange of Gases NEET PYQs<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep the volumes, partial pressure and transport tables beside you for the first round, then solve the second round without them.<\/p>\n\n\n\n<h2 id=\"conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Breathing and Exchange of Gases is a chapter of numbers, and NTA keeps asking the same ones. Use this breathing and exchange of gases NEET PYQ analysis to master respiratory volumes and capacities, partial pressures, gas transport, the dissociation curve and regulation. Then practise the past questions until each value comes without thinking.<\/p>\n\n\n\n<h2 id=\"\u2753-faq\" class=\"wp-block-heading\">\u2753 FAQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: How many questions come from Breathing and Exchange of Gases in NEET?<\/strong> A: Usually one to two questions a year, most often on respiratory volumes and capacities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: What is the most important topic in this chapter for NEET?<\/strong> A: Respiratory volumes and capacities, asked in most recent years, followed by the transport of gases and the oxygen dissociation curve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: What is the formula for vital capacity?<\/strong> A: Vital capacity = IRV + TV + ERV. It is the maximum air a person can breathe out after a forced inspiration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: How is CO\u2082 transported in blood?<\/strong> A: About 70% as bicarbonate, 20\u201325% as carbamino-haemoglobin in RBCs and about 7% dissolved in plasma.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Where is the respiratory rhythm centre?<\/strong> A: In the medulla. The pneumotaxic centre in the pons moderates it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Where can I practise Breathing and Exchange of Gases NEET PYQs for free?<\/strong> A: You can solve every previous year question from this chapter chapter-wise for free using the practice links in this article.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quick answer: A breathing and exchange of gases NEET PYQ analysis shows that NTA asks about one to two questions a year from this chapter, and the single most repeated topic is respiratory volumes and capacities (asked in 2019, 2020, 2022, 2023, 2024 and 2026). The other repeated areas are the transport of O\u2082 and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7326,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,68,2],"tags":[4376,2804,4574,7,15,4008,2328,4380,4573,4572,4571,4383,4570],"class_list":["post-7325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-study-tips","category-biology","category-neet","tag-breathing-and-exchange-of-gases","tag-class-11-biology","tag-emphysema","tag-neet-2027","tag-neet-biology","tag-neet-chapter-wise-pyq","tag-neet-pyq","tag-oxygen-dissociation-curve","tag-partial-pressure","tag-pneumotaxic-centre","tag-respiratory-volumes","tag-transport-of-gases","tag-vital-capacity"],"_links":{"self":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/comments?post=7325"}],"version-history":[{"count":1,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7325\/revisions"}],"predecessor-version":[{"id":7327,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7325\/revisions\/7327"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media\/7326"}],"wp:attachment":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media?parent=7325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/categories?post=7325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/tags?post=7325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}