t Effeceive arteral volume EFferent arteriolar vasoconstncton 會 Aortic BP 4 Aortic oncatc prassure + Filtration fraction ↑ Peritubular capillary hydrostatic pressure + Peritubular cap ary oncotic pressure t Interstitial 4 Interstitial hydrostatic pressure oncotic pressure tIght junction +volume 4 Active NaCl permeat ty absorption absorption onwectwe Nac absorption 4 Net NaCl t Net organic solute +Net NaHCO3 absorption absorpti。n