Question

adh causes this to be reabsorbed at the collecting duct?
a. sodium
b. calcium
c. water
d. urea

Explanation:

ADH (antidiuretic hormone) acts on the collecting duct of the nephron. Its main function is to increase the permeability of the collecting duct to water. This allows more water to be reabsorbed from the filtrate back into the bloodstream. Sodium reabsorption in the collecting duct is mainly regulated by aldosterone. Calcium reabsorption is regulated by parathyroid hormone and calcitonin in other parts of the nephron. Urea reabsorption is a more complex process not primarily regulated by ADH in the collecting duct in the context of what ADH is most known for.

Answer:

C. Water