Ammonia is not allowed to accumulate in the body but is rapidly converted to urea because ammonia is
- A. too large a molecule to transport
- B. highly toxic even in low concentrations
- C. needed for protein synthesis
- D. insoluble in water
Explanation
Ammonia raises pH and poisons cells, particularly neurons, so it must be detoxified at once. Urea is far less toxic and soluble enough to travel safely to the kidney.
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