Changes

[[Image:RAS.jpg|right|thumb|300px|<small><center> Schematic of the RAAS ©RVC 2008</center></small>]]

[[Image:RAS.jpg|right|thumb|300px|<small><center> Schematic of the RAAS ©RVC 2008</center></small>]]

==Introduction==

==Introduction==

The RAAS allows an animal’s salt intake to vary without any great affect on ECF volume or arterial pressure. If an animal’s salt intake increased 50x its blood pressure would only increase 5-6mmHg

The RAAS is activated whenever blood flow through the kidneys is reduced and when there are sodium losses in conditions such as diarrhoes, vomiting or excessive sweating. These losses reduce extracellular fluid volume and this in turn reduces arterial blood pressure, which triggers the RAAS system through several different mechanisms. 

* Without the RAAS it would go up 10x that amount!

===The System===

===The System===