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Renal System O1

Renal blood flow and GFR- Hamra- 1/30-31/2013

Normal GFR 180 L/day
Oncotic pressure in the glomerulus rises faster in high or low flow? Low
As RBF increases, GFR Increases
Filtration fraction is higher at high or low flows? Low flows
Which factor dominates GFR changes in slight vasoconstriction? Pgc
Which factor dominates GFR changes in severe vasoconstriction? Renal plasma flow
Explain why the PTC's have a relatively high oncotic pressure The fluid filtration out of the glomeruli leaves the proteins behind which increases the PCT oncotic pressure
Explain why the PTCs have a relatively low hydrostatic pressure The high resistance in the efferent arteriole means that the hydrostatic pressure downstream is lower than normal
Autoregulation includes which two processes? Myogenic response and Tubuloglomerular feeback
The myogenic response responds to a stretch of smooth muscle with An increase in constriction of the arteriolar smooth muscle
Renal blood flow and GFR are help constant in which BP range 80-180 mmHg
If the macula densa senses too much NaCl in the distal tubule, a signal is sent to the afferent arteriole to constrict (via adenisine)
As blood pressure increases, afferent arteriolar resistance Increases
A low dose of Dopamine causes Vasodilation
Created by: mcasto