What role does Na+/K+-ATPase play in salt excretion by the shark rectal gland?

Question

Quizplus · Accepted Answer

Na+/K+-ATPase plays a crucial role in salt excretion by the shark rectal gland. It pumps sodium out and potassium into the cells across the basolateral membrane, establishing a concentration gradient that drives diffusion of ions across the apical membrane. This creates a net movement of sodium and chloride ions into the gland lumen, which is then excreted as a hypertonic fluid.

What Role Does Na+/K+-ATPase Play in Salt Excretion by the Shark