The Regulation of Water and Ion Excretion Occurs Primarily Within

Question

The regulation of water and ion excretion occurs primarily within the
A) proximal tubules only.
B) late distal tubules only.
C) collecting ducts only.
D) both proximal tubules and late distal tubules.
E) both collecting ducts and late distal tubules.

Accepted Answer

The regulation of water and ion excretion primarily occurs within both the collecting ducts and the late distal tubules. These areas of the nephron are key sites for the hormonal control of water and electrolyte balance, allowing the body to adjust urine concentration according to needs.