Urea
A)is found in the filtrate and is reabsorbed,but is still found in the urine.
B)never leaves the blood plasma.
C)is filtered and reabsorbed totally.
D)is filtered,but not reabsorbed.

Question

Quizplus · Accepted Answer

Urea is filtered from the blood and some of it is reabsorbed by the kidneys, but a portion of it remains in the urine. Therefore, it is found in both the filtrate and the urine. It is not true that urea never leaves the blood plasma as it is filtered by the kidneys. It is also not true that urea is filtered and reabsorbed totally as some urea is excreted in the urine. Finally, it is not true that urea is filtered but not reabsorbed as some of it is indeed reabsorbed by the kidneys.