Question

Write short notes on selective reabsorption

Answer 1

Nearly 99 per cent of the filtrate formed after glomerular filtration has to be reabsorbed by the renal tubules. This process is called reabsorption. Though, this reabsorption takes place selectively allowing substances useful to be reabsorbed excluding those not needed by the body. Hence, it is called selective reabsorption. The tubular epithelial cells in different segments of nephron perform this either by active or passive mechanisms.

For example, substances like glucose, amino acids, Na+, etc., in the filtrate are reabsorbed actively.