Which Activity of the Nephron Will Remove Unwanted Substances from the Filtrate

Question

Which activity of the nephron will remove unwanted substances from the filtrate?
A) collecting system
B) glomerular filtration
C) tubular reabsorption
D) tubular secretion

Accepted Answer

Tubular secretion is the process in which the nephron removes unwanted substances, such as excess ions, drugs, and toxins, from the filtrate and secretes them into the tubules for excretion. The other choices, glomerular filtration, tubular reabsorption, and collecting system, are not involved in removing unwanted substances from the filtrate.