Question:
In Ornithine cycle, which of the following wastes are removed from the blood?
In Ornithine cycle, which of the following wastes are removed from the blood?
Updated On: Jun 7, 2022
- Urea and urine
- Ammonia and urea
- $ CO_{2} $ and ammonia
- $ CO_{2} $ and urea
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The Correct Option is C
Solution and Explanation
Mammals are ureotelic organisms. In these organisms the ammonia deposited in the mitochondria of liver cells is converted into urea in the Omithine cycle or urea cycle. Hans Kreb discovered this cycle in $1932$ (who later also discovered citric acid cycle). Urea production is occurred almost exclusively in liver and it passes into blood stream and then to kidneys. During excretion of this urea through kidneys, $ CO_{2} $ is also excreted.
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Excretory products and their elimination
The physiological process of the elimination of metabolic waste from the body is called excretion. The excretory products comprise amino acids, carbon dioxide, urea, uric acid, water, and ammonia. Some of the Molluscs and Echinoderms excrete waste products from the body in the form of amino acids. Ammonia is the foremost excretory product in animals, it is derived from the proteins exists in the food we eat.
Excretory Products in Different Organisms:
Read More: Excretion in Human Beings