Cartilaginous Fishes Maintain an Osmotic Concentration in Their Tissue Fluids

question 42

Multiple Choice

Cartilaginous fishes maintain an osmotic concentration in their tissue fluids that matches that of seawater by

• A) excreting large amounts of water.
• B) drinking large amounts of seawater.
• C) concentrating seawater salts in their blood.
• D) concentrating urea in their tissue fluids.
• E) excreting salts at their gills.

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