The regulation of water and ion excretion occurs primarily within the : Collecting ducts and last distal tubules
Ion excretion is the removal of excessive H⁺ ions form the body when the human blood becomes too acidic. The ions are removed from the body through urine via PCTs and collecting tubules.
The regulation of water in the body is also carried out during the excretion of excessive ions in the body via collecting ducts and lasat distal tubules which are parts of the nephrons of kidney.
Hence we can conclude that the regulation of water and ion excretion occurs primarily within the : Collecting ducts and last distal tubules
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