Zoology - Human Health and Diseases Question with Solution | TestHub

Cigarette smoke contains a high concentration of$\mathrm{C}\mathrm{O}$and smokers are exposed to an estimated 400-500 ppm$\mathrm{C}\mathrm{O}$while smoking and consequently have much higher$\mathrm{C}\mathrm{O}\mathrm{H}\mathrm{b}$. A necessary consensus, given the variability level of$\mathrm{C}\mathrm{O}\mathrm{H}\mathrm{b}$due to environmental$\mathrm{C}\mathrm{O}$, suggests an absolute upper limit of normal COHb of 3 % for non-smokers and 10 % for heavy smokers