Changes

Essential Ion and Compound Balance and Homeostasis - Anatomy & Physiology (view source)

375 bytes removed , 15:13, 4 September 2008

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===Buffers of H+ in Urine===

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~~[[Image:buffereg1ap.jpg|right|thumb|200px|<center>The HPO4-Buffer System</center>]]~~

* Weak acids are filtered and act as buffers

* Ability depends upon pKa+ and concentration

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=====The Role of Ammonium in the Proximal Tubule=====

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~~[[Image:ammoniumproxitubap.jpg|right|thumb|200px|<center>The Role of Ammonium in the Proximal Tubule</center>]]~~

* The body is able to excrete H+ as ammonium NH4+. This is very useful as:

* It adds flexibility to renal acid base regulation and can help regulate NH4+

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=====The Role of Ammonium in the Collecting Ducts=====

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~~[[Image:ammoniumcollductap.jpg|right|thumb|200px|<center>The Role of Ammonium in the Collecting Duct</center>]]~~

* Very different mechanism

* No bicarbonate produced

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