| Urinary
Concentration |
| Active transport |
| Passive |
| NaCl |
| NaCl |
| H2O |
| H2O |
| NaCl |
|
|
|
|
|
| Cortical |
||||
| collecting |
||||
| duct |
||||
| H2O |
| 100 |
| 60 |
| 150 |
|
|
|
| Descending |
||
| limb |
||
| NaCl |
| Distal tubule |
|
|
| Cortex |
|
| Medulla |
|
| 300 |
| 300 |
| NaClK |
| H2O |
| 100 |
| +ADH |
| 600 |
|
|
|
| Ascending |
||
| limb |
||
| H2O |
| NaClK |
| 400 |
| H2O |
| Urea |
| NaClK |
|
|
|
|
|
| Medullary |
||||
| collecting |
||||
| duct |
||||
| 900 |
| 900 |
| 900 |
| 700 |
| H2O |
| H2O |
| NaCl |
| NaClK |
| 1000 |
| 1200 |
| 1000 |
| 1000 |
| H2O |
| H2O |
| Urea |
| 1200 |
| 1200 |
| 1200 |
| H2O |