THE OSMOTIC GRADIENT CONCENTRATES THE URINE WHEN VASOPRESSIN (ANTI DIURETIC HORMONE [ADH]) IS PRESENT

From

Distal

Tubule

Cortex

Medulla

300

450

600

750

900

1050

1200

1200

300

400

550

700

850

1000

1100

1200

Interstitial Fluid

Collecting

Duct

Pores

Open

Passive Water Flow

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