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← Nature & AnimalsWhich outcome directly results when diadromous fish encounter downstream osmotic gradient reversal?
A)Cell lysis due intracellular ion influx
B)Cerebral swelling due disrupted sodium balance
C)Kidney failure due to electrolyte imbalance✓
D)Gill damage caused by increased mucus
💡 Explanation
When fish encounter reversed osmotic gradients, dysregulation occurs because the external salinity challenges osmotic balance via diffusion, straining kidney function to maintain ion ratios. Therefore kidney failure results, rather than cell lysis, swelling or gill damage which require cellular or surface processes.
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