Normally, Concentrations of Wastes, Such as Urea, Are

Multiple Choice

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.