What is the correct order of filtrate flow through the renal tubule?
a. Loop of henle - DCT - PCT - collecting duct
b. PCT - loop of henle - DCT - collecting duct
c. PCT - DCT - loop of henle - collecting duct
d. Minor calyx - collecting duct - loop of henle - PCT
Answer: b. PCT - loop of henle - DCT - collecting duct
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