50 Most Important NEET PYQs of Chapter 17: Breathing and Exchange of Gases – Part 1 (Q1–25)
🔥 50 Most Important NEET PYQs of Chapter 17: Breathing and Exchange of Gases – Part 1 (Q1–25) 📚 By neetpyqall | biologyatease1.blogspot.com Here’s Part 1 of Chapter 17: Breathing and Exchange of Gases , with the first 25 important NEET questions! 1. Which structure prevents the collapse of trachea? A) Smooth muscle B) Cartilaginous rings C) Pleural fluid D) Diaphragm ✅ Answer: B) Cartilaginous rings 🧠Explanation: C-shaped cartilaginous rings keep the trachea open during breathing. 2. The functional unit of lungs is: A) Bronchiole B) Alveolus C) Trachea D) Bronchus ✅ Answer: B) Alveolus 🧠Explanation: Gas exchange occurs in the alveoli. 3. Respiratory pigment in humans is: A) Haemocyanin B) Hemoglobin C) Chlorocruorin D) Haemerythrin ✅ Answer: B) Hemoglobin 🧠Explanation: Hemoglobin transports oxygen in blood. 4. The volume of air remaining in lungs after normal expiration is called: A) Residual volume B) Tidal volume C) Vital capacity D...