Freshwater bony fishes maintain water balance | vedclass

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Question

(A) Freshwater bony fishes live in a medium that is hypotonic to their body fluids. Consequently,water tends to enter their bodies through osmosis,pri

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Excreting hypotonic urine

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(A) Freshwater bony fishes live in a medium that is hypotonic to their body fluids. Consequently,water tends to enter their bodies through osmosis,primarily across the gills. To maintain osmotic balance,these fishes: $1$. Excrete large volumes of very dilute (hypotonic) urine to remove excess water. $2$. Actively absorb salts from the surrounding water through their gills to compensate for salt loss. $3$. They do not drink water,as they already have an excess of it. Therefore,the correct mechanism for maintaining water balance is the excretion of hypotonic urine.

Freshwater bony fishes maintain water balance by:

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