The collecting ducts in the kidney

A. False Active transport of water has not been described in the body.

B. False More than half of the water in glomerular filtrate is reabsorbed in the proximal tubules.

C. False Conversely, they are rendered permeable to water by ADH which induces water channels in the collecting ducts.

D. True Osmolality in the inner medullary interstitium can exceed 1 osmol/litre.

E. True By determining the amount of water reabsorbed as the glomerular filtrate passes through the hypertonic medullary interstitium