A combustion reaction is when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat. A combustion reaction always has oxygen as one reactant.The second reactant is always a hydrocarbon, which is a compound made up of carbon and hydrogen. combustion reaction is when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat. A combustion reaction always has oxygen as one reactant. The second reactant is always a hydrocarbon, which is a compound made up of carbon and hydrogen.
Another important effect of iron in heme metabolism is its role in the accumulation of uro-and hepta-carboxyl porphyrins in the liver known to occur in porphyria cutanea tarda (PCT). 14 Most patients with PCT have a moderate increase of liver iron, which seems to play a role in the pathogenesis of the disease.
Apart from bleeding, most iron leaves the body in the feces. The liver puts iron into bile, the bile is released into the small intestine, and then it comes out in the feces. Most of the iron in the human body is used in hemoglobin and myoglobin. Hemoglobin stores and transports oxygen in the blood. Myoglobin stores oxygen in muscles. Hemoglobin and myoglobin both contain iron in a heme group.