Question

What is the process in the renal tubules where essential substances, including glucose and ions, are reabsorbed to maintain fluid and electrolyte balance?

1) Filtration
2) Secretion
3) Excretion
4) Tubular reabsorption

Answer 1

Tubular reabsorption is the process in the renal tubules where glucose and ions are reabsorbed to maintain fluid and electrolyte balance, occurring mainly in the proximal convoluted tubule and the loop of Henle.

Step-by-step explanation:

The process in the renal tubules where essential substances, including glucose and ions, are reabsorbed to maintain fluid and electrolyte balance is called tubular reabsorption . During this process, about two-thirds of the filtered salts and water and all of the filtered organic solutes are reabsorbed from the filtrate by the blood in the peritubular capillaries, primarily occurring in the proximal convoluted tubule and the loop of Henle. This reabsorption is critical for the body's fluid and electrolyte balance, ensuring that vital substances are not excreted in the urine and are retained in the bloodstream.