Chapter 25, Problem 25.38P

Which of the following locations corresponds to each set of partial pressures of ${\text{O}}_{\text{2}}$ and ${\text{CO}}_{\text{2}}$ : [1] inhaled air; [2] capillaries at the arterial end; [3] capillaries at the venous end; tissues?
${\text{P}}_{{\text{O}}_{\text{2}}}\left(\text{mm}\text{Hg}\right){\text{P}}_{{\text{CO}}_{\text{2}}}\left(\text{mm}\text{Hg}\right)$

1. 40   60
2. 100   40
3. 160   0.3
4. 70   45