Table 2.
DN solute transport under baseline conditions (entering flow = 6 nl/min, Na+ = 65, K+ = 2.0, HCO3− = 8.0)
| DCT | CNT | CCD | OMCD | IMCD | Total | |
|---|---|---|---|---|---|---|
| Absolute delivery, μmol/min | ||||||
| Na+ | 14.04 | 8.42 | 4.79 | 4.57 | 5.37 | 3.22 |
| K+ | 0.43 | 0.80 | 2.70 | 2.53 | 1.92 | 1.30 |
| Cl− | 12.12 | 8.02 | 6.42 | 5.94 | 6.42 | 3.96 |
| HCO3− | 1.73 | 0.79 | 0.64 | 0.50 | 0.31 | 0.09 |
| TA | 0.24 | 0.48 | 0.60 | 0.42 | 0.41 | 0.41 |
| NH4+ | 0.68 | 0.66 | 0.49 | 0.42 | 0.51 | 0.53 |
| Net acid | −0.80 | 0.35 | 0.45 | 0.34 | 0.60 | 0.85 |
| Absolute reabsorption, μmol/min | ||||||
| Na+ | 5.62 | 3.63 | 0.22 | −0.80 | 2.15 | 10.82 |
| K+ | −0.37 | −1.90 | 0.17 | 0.60 | 0.62 | −0.87 |
| Cl− | 4.10 | 1.60 | 0.48 | −0.47 | 2.46 | 8.16 |
| HCO3− | 0.94 | 0.15 | 0.14 | 0.19 | 0.22 | 1.64 |
| TA | −0.23 | −0.12 | 0.18 | 0.02 | −0.00 | −0.17 |
| NH4+ | 0.02 | 0.18 | 0.06 | −0.09 | −0.02 | 0.16 |
| Net acid | 1.15 | 0.10 | −0.10 | 0.26 | 0.25 | 1.65 |
DN, distal nephron; CNT, connecting tubule; CCD, cortical collecting duct; OMCD, outer medullary duct; IMCD, inner medullary collecting duct; TA, titratable acid.