Hemoglobin in humans has the highest affinity for which of the following gases?
[A] Methane
[B] Carbon Monoxide
[C] Nitrous oxide
[D] Carbon dioxide
Show Answer
Correct Answer: B [Carbon Monoxide]
Notes:
Hemoglobin in humans has a very high affinity for carbon monoxide, forming carboxyhemoglobin which is a very bright red in color. Carbon monoxide is thus problematic for humans because it has affinity higher than that of oxygen.
