NEET Biology MCQs | Human Respiratory System | With Explanation

NEET Biology MCQs – Human Respiratory System

This post is specially designed for NEET (UG) aspirants. All questions are NCERT-based and provided with correct answers and easy explanations.


Q1. In humans, the exchange of gases takes place in:

A. Trachea
B. Bronchus
C. Alveoli
D. Larynx

✅ Correct Answer: C. Alveoli

Explanation: Alveoli are thin-walled air sacs surrounded by capillaries where oxygen and carbon dioxide exchange occurs.


Q2. What is the main function of haemoglobin?

A. Digestion of food
B. Transport of oxygen
C. Blood clotting
D. Immunity

✅ Correct Answer: B. Transport of oxygen

Explanation: Haemoglobin present in RBCs binds with oxygen in the lungs and transports it to body tissues.


Q3. Which part of the brain controls respiration?

A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus

✅ Correct Answer: C. Medulla oblongata

Explanation: The medulla oblongata regulates involuntary actions such as breathing and heart rate.


Q4. The respiratory pigment present in human blood is:

A. Myoglobin
B. Haemoglobin
C. Chlorophyll
D. Cytochrome

✅ Correct Answer: B. Haemoglobin

Explanation: Haemoglobin is the iron-containing pigment responsible for oxygen transport.


📌 Important Points for NEET

  • All questions are based on NCERT
  • Frequently asked concepts in NEET
  • Useful for quick revision

🔔 Conclusion

Practice these MCQs daily to strengthen your NEET Biology preparation. Bookmark this page and share it with your friends.

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