You're Resting on the Couch Watching TV

Multiple Choice

You're resting on the couch watching TV.Which of the following is the most likely reflection of the values in your body? Regarding the partial pressures of O₂ and CO₂,which of the following statements is true in a normal person at rest?

A) Atmospheric PO₂ is approximately 100 mmHg and the alveolar PO₂ is approximately 160 mmHg.
B) The PCO₂ in the air is approximately 40 mmHg and the alveolar PCO₂ is approximately 60 mmHg.
C) The PO₂ in the systemic arteries is approximately 100 mmHg and the alveolar PO₂ is approximately 105 mmHg.
D) PCO₂ in the systemic veins is less than systemic arterial PCO₂.
E) PCO₂ in the pulmonary arteries is less than pulmonary venous PCO₂.