Substance X was isolated in a urine sample, but it is too big to pass through the glomerular filtration membrane. How is this possible?
A)The glomerulus must be infected and hyperpermeable.
B)The kidney must be damaged.
C)It was secreted later in the distal tubule.
D)It isn't possible. There was a flaw in the urinalysis.

Question

Quizplus · Accepted Answer

Substance X could have been secreted into the urine in the distal tubule, bypassing the glomerular filtration membrane.

Substance X Was Isolated in a Urine Sample, but It