A nitrogenous base created when proteins are catabolized:

RENAL AND ACID BASE PHYSIOLOGY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	Urea
B	Ammonia
C	Bicarb
D	Creatinine

Explanation:

Detailed explanation-1: -Ammonia is produced by the catabolism of yolk amino acids and proteins in fish embryos. Some ammonia is converted to glutamine (GLN) and urea via the urea cycle. Ammonia and urea are transported across the cutaneous surface by membrane proteins.

Detailed explanation-2: -Urea is formed in the liver and excreted in the urine. Hence, the end product of nitrogen metabolism in mammals is urea.

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