Match the substances, labelled a. through f., with the processes listed.
-filtered but not reabsorbed or secreted
A)K⁺
B)glucose
C)inulin
D)plasma protein
E)urea
F)H⁺

Question

Quizplus · Accepted Answer

Inulin is a substance that is filtered by the glomerulus but is not reabsorbed or secreted by the tubules. This property allows it to be used to measure the glomerular filtration rate (GFR).

Answer: D
 Plasma proteins (such as albumin) are large molecules that are filtered by the glomerulus but are not normally found in urine because they are reabsorbed by the tubules.

Answer: E
 Urea is a small molecule that is both filtered and partially reabsorbed by the tubules. It is not normally secreted in significant amounts.

The other choices (A, B, and F) are all substances that are filtered and either reabsorbed or secreted by the tubules.

Match the Substances, Labelled A