Which substances are reabsorbed in $PCT$?

Which process is responsible for the excretion of drugs and toxins from the blood into the filtrate?

Draw a labelled diagram showing reabsorption and secretion of major substances at different parts of the nephron.

Classify the following substances as actively or passively transported during the reabsorption of $GFR$: glucose,amino acids,nitrogenous wastes,$Na^+$,water.

In which part of the nephron is reabsorption minimum from the filtrate?

Explain the function of collecting tubules.