Which strategies would a seawater fish with an internal osmolarity of 320mOsm/L living in a marine environment of 1010mOsm/L utilize to maintain internal ion and water homeostasis?
A)produce copious amounts of dilute urine
B)drink seawater and actively excrete salts out of their bodies across the gills
C)don't drink seawater and actively transport salts into their bodies at the kidneys
D)drink seawater and actively transport salts into their bodies at the gills
E)All of the choices for this question are correct.

Question

Quizplus · Accepted Answer

Seawater fish live in a hypertonic environment (where the surrounding water has a higher osmolarity than their internal fluids), so they lose water by osmosis. To compensate, they drink seawater and actively excrete the excess salts through specialized cells in their gills, not by transporting more salts into their bodies. This strategy helps them maintain water and ion balance.

Which Strategies Would a Seawater Fish with an Internal Osmolarity