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BR-5

Physiology

QuestionAnswer
Major site of water reabsorption in GI jejunum > ileum > colon
Most effective nephron site for acid excretion proximule tubule
Nephron site for ADH effect collecting duct
Nephron site for greatest generation of free water thick ascending limb of medulla
Compression of thorax under water pruduces: a restrictive pattern of PFTs
Constriction of efferent arteriole: increases GFR and decreases renal plasma flow
Starling equation for GFR GFR = Kf[(Pgc-Pbs) - "pi"gc)], where Kf = filtration coefficient, Pgc = hydrostatic pressure in glomerular capillary, Pbs = hydrostatic pressure in bowman's space; "pi"gc = oncotic pressure in glomerular capillary
Filtration fraction in glomerulus FF = GFR/RPF
Constriction of afferent arteriole no change in FF (dec GFR / dec RPF)
constrict efferent arteriole increases FF (inc GFR / dec RPF)
increase plasma protein concentration (inc osmotic pressure of glomerular capillary) decreases the FF; (dec GFR / no change in RPF)
decreasing plasma protein concentration (dec oncotic pressure) increases FF (inc GFR / no change in RPF)
Constriction of ureter, decreases Pbs and decreases GFR FF dec w/o affecting RPF (dec GFR / no change in RPF)
Negative charge of GBV maintained by heparan sulfate
S1 heart sound correlates with C wave in jugular venous pulses (closure of tricuspid valve)
Carotid massage dec heart rate and increases vasodilation (innervated by CNIX and X; impulses inhibit tonic discharge of vasoconstrictor nerves and excite vagal innervation of heart = vasodilation/venodilation, drop in bp and hr, and dec CO
Created by: bscaryp
 

 



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