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Breathing and Exchange of Gases Quiz

Class XI
Biology
Breathing and Exchange of Gases
12 questions
HARD

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1. What is the primary muscle involved in the process of breathing?

Diaphragm · Intercostal muscles · Abdominal muscles · Pectoral muscles

2. Which gas is primarily exchanged in the alveoli during respiration?

Oxygen · Carbon dioxide · Nitrogen · Hydrogen

3. What is the term for the volume of air inhaled or exhaled in a normal breath?

Vital capacity · Tidal volume · Residual volume · Total lung capacity

4. Which part of the respiratory system is responsible for the warming and humidifying of air?

Trachea · Bronchi · Nasal cavity · Alveoli

5. What is the role of surfactant in the lungs?

Facilitates gas exchange · Reduces surface tension · Increases lung capacity · Filters air