In a healthy man, glucose is not found in urine. Which one of the following statements justifies this?

• A

  The filtration membrane is permeable to urea but impermeable to glucose

• B

  Glucose is neither filtered nor secreted into the renal tubule

• C

  Glucose is completely reabsorbed into the blood from the proximal convoluted tubule

• D

  Tubular cells utilise glucose to generate ATP required for active transport