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Questions and Answers
The kidney can form urea from ammonia.
The kidney can form urea from ammonia.
False
The brain can synthesize urea from citrulline.
The brain can synthesize urea from citrulline.
True
The urea cycle is present in the liver.
The urea cycle is present in the liver.
True
The formation of urea from ammonia requires energy in the form of ATP.
The formation of urea from ammonia requires energy in the form of ATP.
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The first two reactions of the urea cycle occur in the cytosol.
The first two reactions of the urea cycle occur in the cytosol.
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The urea cycle is also known as the Krebs-Henseleit cycle.
The urea cycle is also known as the Krebs-Henseleit cycle.
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Ornithine transcarbamoylase catalyzes the reaction that produces citrulline in the urea cycle.
Ornithine transcarbamoylase catalyzes the reaction that produces citrulline in the urea cycle.
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Arginino succinase catalyzes the cleavage of arginine in the urea cycle.
Arginino succinase catalyzes the cleavage of arginine in the urea cycle.
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Ornithine is transported into the mitochondria for continuation of the urea cycle.
Ornithine is transported into the mitochondria for continuation of the urea cycle.
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Deficiency of any urea cycle enzyme leads to decreased ammonia levels.
Deficiency of any urea cycle enzyme leads to decreased ammonia levels.
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Disorders of the urea cycle are characterized by respiratory acidosis.
Disorders of the urea cycle are characterized by respiratory acidosis.
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The normal range of blood urea in healthy adults is 20-40 mg/dl.
The normal range of blood urea in healthy adults is 20-40 mg/dl.
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