Select the true statement - Vidyadip

MCQ

Select the true statement

A
In fishes kidney play a major role in ammonia excretion
B
Ammonia is $100,000$ times less toxic than urea
✓
Sharks retain a large amount of urea in the blood as a major osmolyte to balance the osmolarity of the body fluids
D
Most terrestrial reptile excrete ammonia

✓

Answer

Correct option: C.

Sharks retain a large amount of urea in the blood as a major osmolyte to balance the osmolarity of the body fluids

c
Most terrestrial reptiles excrete uric acid.

• In fishes gills play a major role in excretion of nitrogenous waste by diffusion.
• Urea is less toxic than ammonia by $1,00,000$ times.
• Shark retains urea and $TMAO$ to maintian the osmolarity

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