Breathing and Exchange of Gases Important Questions for NEET 2025 PDF

Breathing and Exchange of Gases Important Questions for NEET: Breathing and exchange of gases form an important part of the NEET syllabus , highlighting how the body absorbs oxygen and removes carbon dioxide. This topic is especially significant for the NEET 2025 exam . Mastering this section requires a clear understanding of respiratory mechanisms and regular practice of relevant questions. This guide provides an overview of key concepts and practice materials to aid effective preparation.

Breathing and Exchange of Gases Important Questions for NEET

Breathing and exchange of gases involve the processes through which oxygen is transported to the cells and carbon dioxide is removed. It is a vital part of maintaining life and involves several organs and structures in the respiratory system. This topic is foundational to understanding human physiology and is commonly tested in NEET exams.

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What is Breathing and the Exchange of Gases?

Breathing is the physical process of inhaling oxygen-rich air and exhaling air that contains carbon dioxide. The exchange of gases refers to the diffusion of oxygen and carbon dioxide across the alveoli and blood capillaries in the lungs. This process ensures the availability of oxygen for cellular activities and the removal of metabolic waste.

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Practice Questions for Breathing and Exchange of Gases for NEET

Answering these questions will help students solidify their understanding of key concepts and prepare effectively for the NEET 2025 exam. Additional sample questions are provided, and the remaining questions can be solved by downloading the PDF.

Q1 Select the incorrect option.

1. pO₂ of tissues = 40 mmHg
2. pCO₂ of alveoli = 40 mmHg
3. pO₂ of oxygenated blood = 95 mmHg
4. pCO₂ of tissues = 0.3 mmHg

Q2 Read the following statements (I-IV) w.r.t. pleura.

1. I and II only
2. II and III only
3. III and IV only
4. I, II, III and IV

Q3 Tidal volume and expiratory reserve volume of an athlete are 500 mL and 1100 mL, respectively. What will be his expiratory capacity if the residual volume is 1200 mL?

1. 1600 mL
2. 1700 mL
3. 2300 mL
4. 2800 mL

Q4 On an average, a healthy human breathes ______ times/minute. Choose the option which fills the blank correctly.

1. 20-40
2. 1-6
3. 12-16
4. 16-25

Q5 Which of the following lung volumes or capacities can be measured by spirometer?

1. Functional residual capacity
2. Residual volume
3. Total lung capacity
4. Vital capacity

Q6 The solubility of CO₂ is ________ than that of the solubility of O₂ in the blood.

Choose the option which fills the blank correctly.

1. 20-25 times lesser
2. slightly higher
3. slightly greater
4. 20-25 times higher

Q7 The amount of oxygen transported by RBCs in blood is:

1. 3%
2. 97%
3. 49%
4. 25%

Q8 Which of the following factors favours the formation of oxyhaemoglobin in alveoli?

1. pO₂ ↓, pCO₂ ↑, H⁺ ↑, Temperature ↑
2. pO₂ ↑, pCO₂ ↑, H⁺ ↓, Temperature ↑
3. pO₂ ↑, pCO₂ ↓, H⁺ ↓, Temperature ↓
4. pO₂ ↓, pCO₂ ↑, pH ↑, Temperature ↓

Breathing and Exchange of Gases Important Questions for NEET PDF

To ensure thorough preparation, students can refer to detailed practice questions with explanations  and Breathing and Exchange of Gases Important Questions PDF specifically designed for NEET 2025. These materials often include practice problems, explanations, and diagrams to enhance understanding. It is recommended to focus on diagrams of the respiratory system, the mechanism of breathing, and the oxygen-haemoglobin dissociation curve.

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