Which Statement About the Human Gas Exchange System Is Not

question 134

Multiple Choice

Which statement about the human gas exchange system is not true?

• A) During inhalation, a negative pressure exists in the space between the lung and the thoracic wall.
• B) Smoking one cigarette can immobilize the cilia lining the airways for hours.
• C) The respiratory control center in the medulla responds more strongly to changes in arterial O₂ concentration than to changes in arterial CO₂ concentration.
• D) Without surfactant, the work of breathing is greatly increased.
• E) The diaphragm contracts during inhalation and relaxes during exhalation.

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