12 Questions
The kidney can form urea from ammonia.
False
The brain can synthesize urea from citrulline.
True
The urea cycle is present in the liver.
True
The formation of urea from ammonia requires energy in the form of ATP.
True
The first two reactions of the urea cycle occur in the cytosol.
False
The urea cycle is also known as the Krebs-Henseleit cycle.
True
Ornithine transcarbamoylase catalyzes the reaction that produces citrulline in the urea cycle.
True
Arginino succinase catalyzes the cleavage of arginine in the urea cycle.
False
Ornithine is transported into the mitochondria for continuation of the urea cycle.
True
Deficiency of any urea cycle enzyme leads to decreased ammonia levels.
False
Disorders of the urea cycle are characterized by respiratory acidosis.
False
The normal range of blood urea in healthy adults is 20-40 mg/dl.
True
Test your knowledge on the urea cycle and the different organs' roles in synthesizing urea. Learn about the limited extent of urea formation in kidneys, the absence of arginase in kidney tissues, and the enzyme functions in the liver. Explore how the brain and kidneys contribute to urea synthesis.
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