Part A Osmoregulation in the Shark The intercellular concentration of three elec

Question

Part A Osmoregulation in the Shark The intercellular concentration of three electrolytes is compared with the concentration of these electrolytes in fluid eliminated from the shark rectal gland as indicated in the table above. Based on this data, which of the following is a likely function of the rectal gland? The rectal gland is able to concentrate Na^+, K^+, and Cl^-. The rectal gland is the only site of osmoregulation in the shark. The rectal gland eliminates metabolic waste. The rectal gland stores only anions.

Explanation / Answer

It acts as a salt gland and removes excess salt from the blood. It also maintain osmotic balance with the seawater.

Thus: The Rectal Gland is able to concentrate Na+, K+ and Cl-.

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