Select the true statement.

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(C) The correct statement is that sharks retain a large amount of urea in the blood as a major osmolyte to balance the osmolarity of the body fluids.$

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

Vedclass · Answer

(C) The correct statement is that sharks retain a large amount of urea in the blood as a major osmolyte to balance the osmolarity of the body fluids.$1$. In most bony fishes,gills play a major role in the excretion of nitrogenous waste (ammonia) by diffusion,not the kidneys.$2$. Ammonia is highly toxic,whereas urea is $100,000$ times less toxic than ammonia.$3$. Most terrestrial reptiles excrete uric acid to conserve water.$4$. Sharks retain urea and $TMAO$ (Trimethylamine oxide) in their blood to maintain the osmolarity of their body fluids,which helps them survive in a marine environment.

Column-$I$	Column-$II$
$(a)$ Ureotelic	$(I)$ Bony fishes, aquatic amphibians and aquatic insects
$(b)$ Ammonotelic	$(II)$ Mammals, marine fishes
$(c)$ Uricotelic	$(III)$ Reptiles, birds, land snails and insects

Similar Questions

Shifting of ammonotelism to ureotelism is seen in

Choose the correct pair.
Column-$I$ Column-$II$
$(a)$ Ureotelic $(I)$ Bony fishes, aquatic amphibians and aquatic insects
$(b)$ Ammonotelic $(II)$ Mammals, marine fishes
$(c)$ Uricotelic $(III)$ Reptiles, birds, land snails and insects

Which of the following groups contains final excretory products?

Select the correct option regarding the toxicity of nitrogenous wastes.

Deamination of excess amino acids and their conversion into urea occurs in the .......

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