Breathing And Exchange Of Gases Animal Respiration Question 20
Because of the relatively high altitude of Antonito, Colorado, the town has a normal barometric pressure of about 600 mm Hg rather than 760 mm Hg as at sea level. The partial pressure of oxygen in Antonito’s air is approximately:
Options:
A) 75 mmHg
B) 126 mmHg
C) 160 mm Hg
D) 760 mm Hg
Show Answer
Answer:
Correct Answer: B
Solution:
Air at sea level with an atmospheric pressure of 760 mm Hg has a partial pressure of oxygen of 160 mm Hg (760 x 21).
Therefore, the partial pressure of $ O_2 $ at Antonito, Colorado, is 600 x 0.21 = 126 mm Hg.
BETA
