NEET Biology: Breathing and Exchange of Gases — MCQ Test 9

Q6. Which lung volume is the total amount of air the lungs can hold after maximum inspiration?

Q7. Which blood vessels are responsible for gas exchange in the lungs?

Q8. Which of the following statements about the structure of the respiratory system is correct?

Q9. What happens to the diaphragm during expiration?

Q10. Which of the following statements about the regulation of respiration is correct?

NEET Biology — Breathing and Exchange of Gases

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Which of the following statements about alveolar gas exchange is incorrect?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Biology preparation, focusing specifically on the chapter Breathing and Exchange of Gases. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Following, Statements, Alveolar, Exchange, Incorrect, and Structure.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. Which of the following statements about alveolar gas exchange is incorrect?

  • A. Oxygen diffuses from alveoli into pulmonary capillaries due to partial pressure differences.
  • B. Carbon dioxide diffuses from blood into alveolar air due to its high solubility.
  • C. The alveolar walls are composed of a thick layer of smooth muscle to regulate diffusion.
  • D. Gas exchange occurs across a thin respiratory membrane.

Q2. Which structure in the respiratory system plays a role in humidifying inhaled air?

  • A. Alveoli
  • B. Trachea
  • C. Nasal chamber
  • D. Larynx

Q3. Which enzyme facilitates the conversion of CO₂ into bicarbonate ions in red blood cells?

  • A. Hemoglobin
  • B. Carbonic anhydrase
  • C. Amylase
  • D. Pepsin

Q4. What prevents the entry of food into the respiratory tract during swallowing?

  • A. Larynx
  • B. Epiglottis
  • C. Trachea
  • D. Pharynx

Q5. Which of the following statements regarding respiratory mechanics is correct?

  • A. Intrapulmonary pressure is always higher than atmospheric pressure.
  • B. During expiration, the diaphragm relaxes and moves upward.
  • C. Air moves into the lungs when intrapulmonary pressure exceeds atmospheric pressure.
  • D. External intercostal muscles contract during expiration.

+ 5 more questions in the actual test

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