Question

 Define 'Excretion'? What happens to glucose that enters the nephron along with filtrate?​

Answer 1

DescriptionExcretion is a process by which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life.

The molecules of glucose are very small. Hence, when it enters the nephron along with the filtrate during excretion, it is passed into the nephron tubule along with urea. However, by tubular reabsorption, the glucose along with some water and other important ions are reabsorbed and are used by the body.