Changes

* Total quantity of sodium is conserved not the actual plasma concentration

* Total quantity of sodium is conserved not the actual plasma concentration

** When sodium is reabsorbed water follows it so the volume of the plasma is altered rather than the concentration of sodium changing

** When sodium is reabsorbed water follows it so the volume of the plasma is altered rather than the concentration of sodium changing

** [[Renin-Angiotensin-Aldosterone System (RAAS) - Anatomy & Physiology| Angiotensin 2]] and [[Aldosterone]] affect sodium but they also affect ECF volume so only quantity affected not concentration

** '''Angiotensin 2''' and '''Aldosterone''' affect sodium but they also affect ECF volume so only quantity affected not concentration

** ADH and thirst response also work together to dilute the ECF if concentrations of sodium are high so although there is more NaCl the actual concentration is not really changed.

** ADH and thirst response also work together to dilute the ECF if concentrations of sodium are high so although there is more NaCl the actual concentration is not really changed.

* If there was no secretion of aldosterone a 20kg dog would excrete 15g per 24 hours

* If there was no secretion of aldosterone a 20kg dog would excrete 15g per 24 hours