Excretory Products and their EliminationMedium
Question
In ornithine cycle, which one pair of the following wastes are removed from the blood ?
Options
A.CO2 and urea
B.CO2 and ammonia
C.Ammonia and urea
D.Urea and sodium salts
Solution
Mammals are ureotelic organisms. In these organisms the ammonia deposited in the mitochondria of liver cells is converted into urea in the Ornithine cycle or urea cycle by addition of CO2. Hans Krebs discovered this cycle in 1932 (later also discovered citric acid cycle). Urea production is occurred almost exclusively in liver and it passes into blood stream and then to kidneys.
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