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Physiology
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Stimulus Effect on GFR Effect on RBF VASOCONSTRICTORS
Sympathetic nerves ↓ ECV ↓ ↓AT-II ↓ ECV ↓ ↓Endothelin ↓ ECV
↑ Stretch AT IIBradykinin Epinephrine
↓ ↓
Adenosine ↓ ↓ ATP *constricts AA
↓ ↓
VASODILATORSProstaglandins ↓ ECV
↑ Stretch AT II
NO CHANGE ↑
NO ↑ Stretch AchHistamine BradykininATP
↑ ↑
Bradykinin Prostaglandin ↓ ACEenzyme
↑ ↑
ANP & BNP*vasoconstrictor of efferent
↑ ECV ↑ ↑(modest change)
ATP *stimulates NO production
↑ ↑
Glucocorticoids ↑ ↑Dopamine