04-25-2008, 07:18 AM
1..The pH of the tubular fluid in the distal nephron can be lower than that in the proximal tubule because:
A. a greater sodium gradient can be established across the wall of the distal nephron than across the wall of the proximal nephron
B. more buffer is present in the tubular fluid of the distal nephron than into the proximal tubule
C. more hydrogen ion is secreted into the distal nephron than in to the proximal tubule
D. the brush border of the distal nephron contains more carbonic anhydrase than that of the proximal tubule
E. the tight junctions of the distal nephron are less leaky to solute than those of the proximal tubule
A. a greater sodium gradient can be established across the wall of the distal nephron than across the wall of the proximal nephron
B. more buffer is present in the tubular fluid of the distal nephron than into the proximal tubule
C. more hydrogen ion is secreted into the distal nephron than in to the proximal tubule
D. the brush border of the distal nephron contains more carbonic anhydrase than that of the proximal tubule
E. the tight junctions of the distal nephron are less leaky to solute than those of the proximal tubule