ECOLOGY
EXCRETORY PRODUCTS AND THEIR ELIMINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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excrete large quantities of electrolytes
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excrete large quantities of water
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take in electrolytes through simple diffusion
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consume large quantities of water
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Detailed explanation-1: -In fresh water, the inside of a fish’s body has a higher concentration of salt than the external environment. Consequently, there is a tendency to lose salt and absorb water. To combat this, freshwater fish have very efficient kidneys that excrete water quickly.
Detailed explanation-2: -Answer and Explanation: Freshwater fish are able to maintain homeostasis through osmoregulation and temperature control.
Detailed explanation-3: -Most marine fishes maintain internal pH homeostasis through the direct transfer of acid-base equivalents between the animal and its external environment.
Detailed explanation-4: -In freshwater fishes, water will diffuse into the body of the fish, so it excretes a very hypotonic or dilute urine to expel all the excess water. Gills absorb salt to compensate for salt lost in urine. This is how they maintain water balance.