Why is carbon monoxide not produced during respiration?


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This message has been edited. Last edited by: DorianGreyed,

Respiration is a biological process that consumes oxygen and produces carbon dioxide by "burning" organic molecules for energy. Because respiration is part of biochemistry, the reactions occur over a narrow range of temperatures and are largely dependent on and controlled by enzyme catalysts. Although it's not completely efficient and produces some toxic compounds, there is no "incomplete combustion" as is seen in auto engines, burning cigarettes, etc.

There is one minor exception to the rule that CO is not produced by cells (here):

quote:

Over the last decade, studies have unraveled many aspects of endogenous production and physiological functions of carbon monoxide (CO). The majority of endogenous CO is produced in a reaction catalyzed by the enzyme heme oxygenase...

Carbon monoxide is such a deadly gas because CO has over 200 times the affinity for hemoglobin as O2 does, so CO blocks oxygen transport in red blood cells, affecting every tissue in the body.

I'm not a chemist. If you need a more chemistry-oriented answer then I defer to the experts here.