Which statement about the respiratory system and oxygen needs is correct?
A) To meet oxygen needs,respiratory structures must be intact by the time they are 2 years old.
B) To meet oxygen needs,alveoli must exchange O2 and CO2.
C) To meet oxygen needs,the airway must be open 50% of the time.
D) To meet oxygen needs,oxygen therapy is needed.

Question

Quizplus · Accepted Answer

Oxygen needs can only be met if the alveoli in the lungs are exchanging oxygen and carbon dioxide. The other options are incorrect. Respiratory structures are fully developed before birth, not at 2 years of age. An open airway is necessary for breathing, but being open only 50% of the time would not be sufficient for meeting oxygen needs. Oxygen therapy may be needed in certain medical conditions, but it is not a universal requirement for meeting oxygen needs.

Which Statement About the Respiratory System and Oxygen Needs Is