Table 1.
Tubular diameters and transport parameters
| Tubule or vessel |
 (cm mmHg/sec) |
 ( cm/sec) |
 ( cm/sec) |
 (nmole/[cm sec]) |
 (nmole/[cm sec]) |
|---|---|---|---|---|---|
| PST | 3.36
|
10 | 1.5 | 2.1 | 10 |
| SDL | 3.06
|
1.5 | 1.1 | 7.4 | 200 | 0.43 | 0 | 0 |
| OM LDL | 2.16
|
63 | 0.5 | 0.43 | 0 |
| IM LDL | 2.07
|
0 | 13 | 180 | 0 | 0 |
IM LDL
|
0 | 0 | 200 | 0 | 0 |
| SAL | 0 | 1.1 | 1.4 | 0.9 | 10.5 | 25.9 | 0 |
| OM LAL | 0 | 1.1 | 1.4 | 0.6 | 10.5 | 25.9 | 0 |
| IM LAL | 0 | 80 | 190 | 0 | 0 |
| OMCD | 4.23
|
1 | 0.3 | 0 | 0 |
| IMCD | 4.23
|
1 | 0.5 to 110 | 8.5 → 4 | 0 |
PST, proximal straight tubule; SDL/LDL, short/long descending limb; SAL/LAL, short/long ascending limb; CD, collecting duct; LDL
, LDL that turns within the first mm of the IM. Arrow (→) indicates that parameter is assumed to vary linearly as x increases; vertical line (|) indicates that parameter is assumed to change abruptly. Axial variations in IMCD 
are given in Ref. (Layton et al. (2012)).