Two substances that can probably be used to determine filtration fraction are -
Insulin and mannitol
Urea anddiodrast
PAH and phenol red
Inulin and PAH
Ans. is 'd' i.e., Inulin and PAH o GFR is measured by inulin and renal plasma flow is measured by PAH.
Glomerular Filtration, Renal Blood Flow, and Their Control