Question

To maintain homeostasis freshwater fish must _____.

A) excrete large quantities of electrolytes
B) consume large quantities of water
C) excrete large quantities of water
D) take in electrolytes through simple diffusion

Answer 1

To maintain homeostasis, freshwater fish excrete large quantities of water to get rid of excess water and prevent their cells from swelling in the hypotonic freshwater environment.

Step-by-step explanation:

To maintain homeostasis, freshwater fish must excrete large quantities of water. Freshwater fish live in a hypotonic environment compared to their internal cell environment. They are continuously in danger of water rushing into their cells due to osmosis. To prevent swelling and to regulate their internal solute concentration, these fish produce very diluted urine. This allows them to rid themselves of the excess water without losing too many electrolytes. Freshwater fish also actively take in salts through their gills to maintain electrolyte balance. Hence, the correct answer to the question is C) excrete large quantities of water.

Freshwater fish must excrete large quantities of water to maintain homeostasis. These fish live in an environment that is hypotonic to their cells, meaning that there is a higher concentration of water outside their bodies. To prevent water from constantly diffusing into their bodies, freshwater fish actively excrete large quantities of water in the form of diluted urine. They also take in salt through their gills to maintain electrolyte balance.

Answer 2

Excrete large quantities of water. (Ans. C)

Step-by-step explanation:

Freshwater fish is able to maintain their homeostasis with the help of osmoregulation. Osmoregulation helps to maintain the concentrations of electrolytes, and the fluid balance to keep the body fluids from becoming too concentrated.

In fish osmoregulation helps to maintain water, and Internal balance of salts. Freshwater fish contains high concentration of salt inside the body compare to external environment. These fish have efficient kidneys which helped them to excrete water quickly, and reabsorb salts from their urine.