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.
Correct Answer:
Verified
Correct Answer:
Verified
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