Question

Define tubular reabsorption and tubular secretion.

Answer 1

As glomerular filtrate courses through tubules, its composition, osmotic pressure and pH change progressively. This is largely due to reabsorption of water and many solutes from it in the tubules. This process is called tubular reabsorption. On the other hand, those products of metabolism which are not at all required by the body and are rather injurious to health, are secreted out by tubular epithelium in the tubular filtrate. This ocess is called tubular secretion.