Acid urine that contains hemoglobin will darken on standing due to the formation of what?

Question

16-07-2025
Health

High School

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Acid urine that contains hemoglobin will darken on standing due to the formation of what?

Answer :

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komalnavarre23 komalnavarre23 · Answer 1 · 2025-05-24T04:02:23-04:00

Final answer:

Acid urine with hemoglobin darkens due to methemoglobin formation, resulting from the oxidation of the iron in hemoglobin. Methemoglobin cannot bind oxygen and can cause symptoms like cyanosis and dyspnea when increased in the body.

Explanation:

Acid urine that contains hemoglobin will darken on standing due to the formation of methemoglobin. Hemoglobin in red blood cells (RBCs) contains iron normally in its ferrous (Fe2+) form. Due to oxidative processes, it can be converted into the ferric (Fe3+) form, resulting in methemoglobin which is dark brown in color.

Methemoglobin cannot bind oxygen, which interferes with the normal function of hemoglobin. Substances like certain drugs and industrial chemicals can increase the levels of methemoglobin, leading to symptoms like cyanosis (blue skin) and dyspnea (labored breathing).

Alongside methemoglobin, urine color can also be influenced by the breakdown of red blood cells, producing various pigments such as urochrome (yellow pigment), biliverdin, and bilirubin which contribute to the urine's characteristic colors under different conditions.