Approximately 65% of Tubular Reabsorption Occurs in The

Question

Approximately 65% of tubular reabsorption occurs in the
A)descending limb of the nephron loop.
B)distal convoluted tubule.
C)ascending limb of the nephron loop.
D)proximal convoluted tubule.

Accepted Answer

The proximal convoluted tubule is responsible for approximately 65% of tubular reabsorption. This is due to its length and the presence of microvilli, which increase its surface area for reabsorption. The descending and ascending limbs of the nephron loop are primarily involved in the formation of the concentration gradient, while the distal convoluted tubule is responsible for fine-tuning the reabsorption and secretion of specific ions.