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. 2017 Feb 8;312(6):F925–F950. doi: 10.1152/ajprenal.00536.2016

Table 8.

Segmental delivery and fluxes at serum K+ = 5.5 mM

SF PCT PST sDHL AHLm AHLc DCT
Delivery
    Na, µmol/min 100.62 31.06 26.47 26.03 15.23 7.52
    K 3.84 1.34 1.67 1.84 0.71 0.45
    HCO3 17.47 2.99 2.68 2.82 1.51 0.76
    NH4 0.138 0.125 0.268 0.276 0.164 0.099
    Net acid −17.28 −2.77 −2.31 −2.39 −1.19 −0.44
    Urea 3.49 1.55 1.46 1.39 1.38 1.35
    FvM, µl/min 699.00 215.22 167.46 150.24 143.70 130.32
Reabsorption
    Na, µmol/min 69.60 4.59 0.44 10.80 7.72 3.38
    K 2.50 −0.33 −0.17 1.13 0.26 −0.19
    HCO3 14.48 0.30 −0.13 1.31 0.75 0.36
    NH4 0.013 −0.143 −0.007 0.112 0.065 −0.091
    Net acid −14.51 −0.46 0.09 −1.20 −0.76 −0.48
    Urea 1.94 0.10 0.06 0.01 0.03 0.04
    FvM, µl/min 483.66 47.75 17.25 6.51 13.41 17.14
JM - All PCT PST lDHLu lDHLl tAHL AHLm AHLc DCT
Delivery
    Na, µmol/min 105.12 30.32 25.84 25.02 24.54 23.78 18.11 12.56
    K 4.02 1.47 1.64 1.90 2.02 2.28 0.96 0.47
    HCO3 18.25 1.34 1.44 1.54 1.60 2.18 1.50 0.89
    NH4 0.144 0.233 0.274 0.289 0.288 0.252 0.187 0.082
    Net acid −18.05 −1.01 −1.08 −1.15 −1.21 −1.85 −1.24 −0.70
    Urea 3.65 1.72 1.58 1.55 1.79 1.70 1.68 1.65
    FvM, µl/min 730.20 213.30 166.26 146.22 136.98 137.04 135.54 132.12
Reabsorption
    Na, µmol/min 74.82 4.47 0.82 0.48 0.76 5.67 5.55 2.10
    K 2.55 −0.18 −0.26 −0.12 −0.25 1.32 0.49 −0.12
    HCO3 16.91 −0.10 −0.10 −0.05 −0.59 0.69 0.61 0.41
    NH4 −0.090 −0.040 −0.015 0.001 0.036 0.065 0.104 −0.083
    Net acid −17.03 0.06 0.07 0.06 0.64 −0.61 −0.54 −0.53
    Urea 1.93 0.14 0.03 −0.24 0.09 0.02 0.03 0.03
    FvM, µl/min 516.72 47.06 20.03 9.24 −0.02 1.45 3.47 5.20
Distal CNT CCD OMCD IMCD Excretion
Delivery
    Na, µmol/min 14.59 6.06 5.49 5.16 3.35
    K 1.24 5.42 5.12 4.21 3.45
    HCO3 0.88 0.65 0.60 0.36 0.05
    NH4 0.356 0.362 0.403 0.404 0.406
    Net acid −0.13 0.23 0.16 0.52 0.87
    Urea 2.93 2.85 2.78 2.68 2.16
    FvM, µl/min 240.06 124.68 79.74 58.40 50.17
Reabsorption Total Total OM Total IM
    Na, µmol/min 8.53 0.57 0.33 1.81 202.44 27.12 3.06
    K −4.18 0.31 0.91 0.76 4.41 2.425 0.383
    HCO3 0.24 0.05 0.25 0.31 35.67 2.208 −0.333
    NH4 −0.006 −0.041 −0.001 −0.003 −0.125 −0.029 0.034
    Net acid −0.36 0.07 −0.36 −0.35 −36.20 −2.409 0.354
    Urea 0.08 0.06 0.10 0.52 4.98 0.463 0.367
    FvM, µl/min 115.38 44.93 21.32 8.23 1,378.80 161.37 17.45