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Breathing and Exchange of Gases Important Questions for NEET FAQs
What is the process of breathing and gas exchange?
Breathing involves inhaling oxygen and exhaling carbon dioxide. Gas exchange occurs in the alveoli of the lungs where oxygen diffuses into the blood, and carbon dioxide diffuses out.
What are the 7 steps of respiration?
The 7 steps include pulmonary ventilation, external respiration, gas transport, internal respiration, cellular respiration, oxygen utilization, and waste elimination.
What is breathing in short notes?
Breathing is the mechanical process of inhaling air rich in oxygen and exhaling air containing carbon dioxide through the respiratory system.
What are the four steps of breathing?
The four steps include inhalation, gas exchange in the lungs, gas transport via blood, and exhalation.
What are the 4 levels of respiration?
The four levels are external respiration (lungs), internal respiration (tissues), cellular respiration (cell level), and pulmonary ventilation (air movement).
Breathing and Exchange of Gases Important Questions for NEET 2025 PDF
Breathing and Exchange of Gases Important Questions for NEET, Prepare for NEET 2025 with this detailed guide on breathing and exchange of gases. Learn key concepts and practice questions.
Soumya Tiwari3 Jan, 2025
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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.
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.
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.
pO₂ of tissues = 40 mmHg
pCO₂ of alveoli = 40 mmHg
pO₂ of oxygenated blood = 95 mmHg
pCO₂ of tissues = 0.3 mmHg
Q2 Read the following statements (I-IV) w.r.t. pleura.
I. It is double-layered and covers the lungs.
II. Fluid between the layers reduces friction on lung-surface.
III. The outer layer is in contact with the thoracic wall.
IV. The inner layer is in contact with the lungs.
Which of the above statements are correct?
I and II only
II and III only
III and IV only
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?
1600 mL
1700 mL
2300 mL
2800 mL
Q4 On an average, a healthy human breathes ______ times/minute.
Choose the option which fills the blank correctly.
20-40
1-6
12-16
16-25
Q5 Which of the following lung volumes or capacities can be measured by spirometer?
Functional residual capacity
Residual volume
Total lung capacity
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.
20-25 times lesser
slightly higher
slightly greater
20-25 times higher
Q7 The amount of oxygen transported by RBCs in blood is:
3%
97%
49%
25%
Q8 Which of the following factors favours the formation of oxyhaemoglobin in alveoli?
pO₂ ↓, pCO₂ ↑, H⁺ ↑, Temperature ↑
pO₂ ↑, pCO₂ ↑, H⁺ ↓, Temperature ↑
pO₂ ↑, pCO₂ ↓, H⁺ ↓, Temperature ↓
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.
