Which of the following explains why a sample of the filtrate taken from the proximal tubule is NOT ideal for conducting a drug test or toxicology screen?
A) As soon as the toxins and drugs enter the proximal tubule, they are immediately reabsorbed.
B) Some of the toxins and drugs do not enter the filtrate until they are secreted in the distal tubule.
C) Many of the toxins and drugs are not added to urine until it enters the bladder.
D) Only a blood test can detect drugs and toxins because they are too large to enter the kidney tubule system.

Question

Quizplus · Accepted Answer

Toxins and drugs may not be present in the filtrate in the proximal tubule because some are secreted into the filtrate in the distal tubule, not the proximal tubule. This means that a sample from the proximal tubule might not contain these substances, making it less ideal for a drug test or toxicology screen.

Which of the Following Explains Why a Sample of the Filtrate