Ammonia combines with _ to form Urea.
Correct answer: D. Carbon dioxide
- A. Oxygen
- B. Water molecules
- C. Uric acid
- D. Carbon dioxide
Explanation
The correct answer is carbon dioxide. Ammonia combines with carbon dioxide in the liver to form urea, which is then excreted from the body. This process is part of the urea cycle, which is crucial for detoxifying ammonia, a byproduct of protein metabolism.Option A: Oxygen is incorrect because it is involved in cellular respiration, not in urea formation.Option B: Water molecules are not directly involved in forming urea from ammonia, though they play a role as a solvent in biochemical processes.Option C: Uric acid is a distinct nitrogenous waste product formed from purines, not from ammonia.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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