Most Tubular Reabsorption Takes Place

Question

Most tubular reabsorption takes place
A) across the glomerular membrane.
B) in response to aldosterone.
C) in response to ADH.
D) across the proximal tubule.

Accepted Answer

Most tubular reabsorption takes place across the proximal tubule, where about 65% of sodium and water are reabsorbed into the bloodstream. ADH and aldosterone are hormones that regulate water and electrolyte balance, but they do not play a significant role in most tubular reabsorption. The glomerular membrane is responsible for initial filtration of blood in the kidneys, but it is not a site of reabsorption.