[单选题]
At which position in the nephron would you expect theb r*exr /5o*pb solute concentrac xfi.dxh(qb 89 6 d:bkby))rytion of the filtrate to be between 200% and 300% that of the normal blood solute concentration and for water, but n.)ifxhbk:9y b6 )bqcryd(x8 dot sodium, to be drawn out of the filtrate into the medulla?