[单选题]
At which position in33rymh8w-rd+sf qkkt7nh3 e 0 the nephron would you expect the solute concentratz dr2hlpvf 61 zy +ikx7*dec*5ion of the filtrate to be between 200% and 300% that of the normal blood solute c1 z 5yr**xzh+clied27f vkdp6oncentration and for water, but not sodium, to be drawn out of the filtrate into the medulla?