Question

4. While blood contains glucose, potassium, albumin, and chloride molecules, a normal urine sample contains

only potassium and chloride molecules. Why do you thing this is so? (1 mark)

Answer 1

Glucose and albumin (a protein) are too big to pass through the glomerulus therefore they should not be found in normal urine while potassium and chloride molecules are small enough to be filtered through the glomerulus, where it can either be reabsorbed back into the blood or go through the entire tract and be excreted with urine.