The Extent of Potassium Excretion Is Regulated Primarily by the

Multiple Choice

The extent of potassium excretion is regulated primarily by the

A) amount secreted into the proximal tubule.
B) amount reabsorbed into the proximal tubule.
C) amount filtered by the basement membrane of the glomerular capillaries.
D) amount reabsorbed in the distal tubule.
E) amount secreted into the distal tubule.