New Topic 14 Flash Cards

 
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PCT, for every Na+ reabsorbed, H+ secreted
HCO3- reabsorbed		 0 mcs5109 Sun, 16 Nov 2008 08:02:39 GMT view revision history
Renal buffering system -slow
-actively Secretes H+ against Na+
-reabsorbs HCO3		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
Respiratory System -fast
-Central Receptor (Medulla oblongota) senes rise in [H+]
-peripheral chemoreceptors sense lower pH, pO2, higher pCO2
-buffering power 2x greater than all other buffering systems		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
Phospahte -more important in kidneys
-kidney tubules has low pH--> closer to pH of buffer		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
HCO3 most important b/c... ...CO2, HCO3- regulated by lungs, kidneys
-Cl- shift favors HCO3- out of cell, into plasma
-HCO3 to CO2 is 20:1		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
Interstitial Fluid Buffers 1. HCO3-
2. HPO4-2 (kidneys)
3. NH3 (kidneys)		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
Blood Buffers 1. HCO3-
2. Hemoglobin
3. Protein (albumin)

(2 and 3 1st line of defense, but become easily saturated; hence, HCO3 becomes most important)		 0 mcs5109 Sun, 16 Nov 2008 07:57:23 GMT view revision history
Intracellular Buffers 1. Proteins (75% of buffering power, but confined to cells; minor role in ECF buffering)
2. HPO4-2		 0 mcs5109 Sun, 16 Nov 2008 07:57:22 GMT view revision history

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name: New Topic 14
num users: 2
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created on: November 15, 2008
last updated: November 16, 2008

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