NEET Zoology Respiratory Organs MCQ Question
Which of the following statements about the process of gas exchange in the respiratory system is correct?
Gas exchange primarily occurs in the alveoli due to their high surface area and thin walls.
Gas exchange occurs equally in all parts of the respiratory system including the trachea and bronchi.
Oxygen and carbon dioxide are exchanged in the alveoli through active transport mechanisms.
Carbon dioxide is primarily transported in the blood as dissolved gas rather than as bicarbonate ions.
Correct Answer
Detailed Explanation
Gas exchange occurs exclusively in the alveoli because they provide a large surface area and are lined by a thin epithelial layer, which facilitates diffusion, as stated in the context.
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