Normally, concentrations of wastes, such as urea, are
A) high in urine in comparison to plasma.
B) high in the filtrate but low in urine.
C) in trace amounts in urine but are high in blood.
D) not in the filtrate but are present in low concentrations in the urine.
E) only found in the excretory organs where they originate from metabolism.

Question

Quizplus · Accepted Answer

Urea is a waste product that is filtered out of the blood in the kidneys and excreted in urine. Normally, concentrations of wastes such as urea are high in urine in comparison to plasma. This is because the kidneys selectively filter waste products from the blood, allowing them to accumulate in the urine while retaining necessary substances in the bloodstream.

Normally, Concentrations of Wastes, Such as Urea, Are