[单选题]
At which position in the nephron would you expect the solute conc: ruf qsfgimn:2i 1/q2entration )4h ) ; nneq-xwrz2qe wsm71ueof the filtrate to be between 200% and 300% that of the normal blood solute concentration and for water, but not sodium, to be drawn ouq7 n 1e-wwehns2ur;q 4zmxe) )t of the filtrate into the medulla?