M

Decreased net reabsorption

-Increased backleak

Figure 27-16

Proximal tubular and peritubular capillary reabsorption under normal conditions (top) and during decreased peritubular capillary reabsorption (bottom) caused by either increasing peritubular capillary hydrostatic pressure (Pc) or decreasing peritubular capillary colloid osmotic pressure (pc). Reduced peritubular capillary reabsorption, in turn, decreases the net reabsorption of solutes and water by increasing the amounts of solutes and water that leak back into the tubular lumen through the tight junctions of the tubular epithelial cells, especially in the proximal tubule.

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