Question

Which of the following excretory organs convert ammonia into urea?

• A. Liver
• B. Skin
• C. Lungs
• D. Ureter

Answer 1

The correct option is A

Liver

The correct option is A.

Explanation of the correct option:

1. Liver is the main site of metabolism.
2. Conversion of toxins, to be excreted also takes place in the liver.
3. So conversion of ammonia into urea, which has to be excreted is done in the liver.

Explanation of the incorrect option:

Option B: Skin also excretes few toxins via sweat. But no conversion takes place inside the skin.

Option C: Lungs perform the function of exchange of gases between the blood and the air. They do not perform the conversion of ammonia to urea.

Option D: Ureter are the tubular structures that carry the urine from the kidney towards the urinary bladder.

Final answer: Excretory organ which convert ammonia into urea is Liver.