In External Respiration, the Partial Pressures Are

Multiple Choice

In external respiration, the partial pressures are:

A) alveoli: high PO₂, low PCO₂; pulmonary capillaries: low PO₂, high PCO₂
B) alveoli: high PO₂, high PCO₂; pulmonary capillaries: low PO₂, low PCO₂
C) alveoli: low PO₂, high PCO₂; pulmonary capillaries: high PO₂, low PCO₂
D) alveoli: low PO₂, low PCO₂; pulmonary capillaries: high PO₂, high PCO₂