Hemoglobin
A)combines preferentially with O₂ over any other substance
B)is known as carboxyhemoglobin when combined with carbon dioxide
C)plays a critical role in determining the amount of O₂ exchanged between alveoli and blood
D)has characteristics a and c
E)has all of the above characteristics

Question

Quizplus · Accepted Answer

Hemoglobin plays a critical role in determining the amount of O₂ exchanged between alveoli and blood, but it does not preferentially combine with O₂ over any other substance (e.g., it binds more strongly with carbon monoxide) and is known as carbaminohemoglobin when combined with carbon dioxide, not carboxyhemoglobin.