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Practice question

MCQ

Question

Which of the following statements about the respiratory system is incorrect?

Options

Choose one · Correct answer highlighted

The pleural fluid reduces friction between the lung surface and thoracic cavity. The right lung has three lobes, while the left lung has two lobes. Inspiration occurs when intrapulmonary pressure is greater than atmospheric pressure. Correct Oxygen diffuses from alveoli to blood, while carbon dioxide diffuses in the opposite direction.

Explanation

Inspiration occurs when intrapulmonary pressure is less than atmospheric pressure, allowing air to flow into the lungs. Therefore, statement 3 is incorrect.

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