Changes

* Increases sodium pump activity

* Increases sodium pump activity

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

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

** This is because water follows sodium so the volume is altered according to the amount of sodium

** 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 also affect ECF so only quantity affected not concentration

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

** ADH and thirst response also work together to dilute the ECF so although there is more NaCl the actual concentration is constant.

** ADH and thirst response also work together to dilute the ECF if concentrations of sodium is 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

* At maximal secretion no significant amount of sodium would be excreted

* At maximal secretion no significant amount of sodium would be excreted