Which of the following statements are true about partial pressure and gas exchange?
- The partial pressure of oxygen in the atmosphere is higher than in the alveoli.
- The partial pressure of carbon dioxide is lower in tissues than in deoxygenated blood.
- The partial pressure of oxygen in oxygenated blood is 95 mm Hg.
Select the correct option:
1
Only 1 and 3
2
Only 2 and 3
3
Only 1 and 2
4
All of the above