42. Osmoregulation and Excretion
Osmoregulation and Excretion
Multiple Choice
Multiple ChoiceWhy do freshwater fish excrete a large amount of very dilute urine?
A
Because they live in a hypoosmotic solution, their cells tend to accumulate a lot of solute that must be excreted.
B
Because they live in a hyperosmotic solution, their cells take up an excess of water that must be excreted.
C
Because they live in a hyperosmotic solution, their cells tend to accumulate a lot of solute that must be excreted.
D
Because animals must live in an isoosmotic solution, they excrete solutes to make the concentration of solutes in the water equal to the concentration of solutes in their cells.
E
Because they live in a hypoosmotic solution, their cells take up excess water that must be excreted.
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