Normally,concentrations of Metabolically Important Substances,such as Glucose,are

Normally,concentrations of metabolically important substances,such as glucose,are:

A) High in the glomerular filtrate but only a trace in urine
B) Low in glomerular filtrate but high in urine
C) High in glomerular filtrate and urine
D) Low in both glomerular filtrate and urine
E) Excluded from entering the excretory system altogether