Transport of carbon monoxide (CO) is diffusion limited because-
Ans. (a) High affinity of CO for hemoglobin(Ref: Ganong, 25th ed/p.640)The affinity of carbon monoxide for hemoglobin is about 210 times more than that of oxygen for hemoglobin
High affinity of CO for hemoglobin
Alveolar membrane is less permeable CO
CO crosses epithelial barrier slowly
ON exposure to air there is sudden increase in partial pressure
Respiratory System