What substance in cigarettes decreases the oxygen-carrying capacity of red blood cells?

Question

Quizplus · Accepted Answer

Carbon monoxide is the substance in cigarettes that decreases the oxygen-carrying capacity of red blood cells. When inhaled, carbon monoxide binds with hemoglobin in red blood cells, forming carboxyhemoglobin which cannot effectively carry oxygen. This leads to a decrease in the amount of oxygen that can be transported to the body's tissues and organs, ultimately contributing to the harmful effects of smoking on health.

What Substance in Cigarettes Decreases the Oxygen-Carrying Capacity of Red