End product of hemoglobin break down is:
Correct answer: B. Bilirubin
- A. Creatinine
- B. Bilirubin
- C. Hypoxanthin
- D. Xanthin
Explanation
Bilirubin is the end product of haemoglobin breakdown. When haemoglobin from old red blood cells is broken down, bilirubin is formed as a byproduct. Bilirubin is then processed by the liver and eventually excreted in the bile, which is eliminated from the body through faeces.Creatinine is a waste product that is produced by the muscles during their normal metabolism. It is not an end product of haemoglobin breakdown.Hypoxanthine is a purine base that is not directly related to haemoglobin breakdown.Xanthine is a purine base that is not directly related to haemoglobin breakdown
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About Excretion
Excretion removes metabolic wastes such as carbon dioxide, urea and excess salts, and differs from egestion, which removes undigested food. Questions cover kidney structure, nephron ultrafiltration, selective reabsorption and urine formation, along with the excretory roles of the lungs, skin and liver in maintaining homeostasis.
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