What role does Na+/K+-ATPase play in salt excretion by the shark rectal gland?
A) Na+/K+-ATPase pumps sodium out and potassium into cells across the apical membrane.
B) Na+/K+-ATPase pumps sodium in and potassium out of cells across the apical membrane.
C) Na+/K+-ATPase pumps sodium out and potassium into cells across the basolateral membrane.
D) Na+/K+-ATPase pumps sodium into and potassium out of cells across the basolateral membrane.
Answer: C
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