Question
Substances such as glucose, amino acids, salts, and a major amount of water in the initial filtrate are:
Completely excreted as urine
Selectively re-absorbed as urine flows along the tubule
Never re-absorbed
Converted into urea
Detailed Explanation
As the initial filtrate flows along the nephron tubule, useful substances like glucose, amino acids, salts, and much of the water are selectively re-absorbed into the blood.