Osmoregulation in the Shark
-The interstitial fluid concentration of three electrolytes is compared with the concentration of these electrolytes in fluid eliminated from the shark rectal gland as indicated in the accompanying table. Based on these data, which of the following is a likely function of the rectal gland?
A) The rectal gland eliminates metabolic waste.
B) The rectal gland is able to concentrate Na+, K+, and Cl−.
C) The rectal gland stores only anions.
D) The rectal gland is the only site of osmoregulation in the shark.
Correct Answer:
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