ANATOMY

Detailed explanation-1: -ADH is secreted by pituitary gland. It increases the water permeability of distal convoluted tubules and collecting tubules, hence, plays a significant role in water re-absorption. The absence of ADH will reduce water reabsorption which may lead to water diuresis or diabetes insipidus.

Detailed explanation-2: -ADH increases the permeability to water of the distal convoluted tubule and collecting duct, which are normally impermeable to water. This effect causes increased water reabsorption and retention and decreases the volume of urine produced relative to its ion content.

Detailed explanation-3: -ADH increases the water permeability of the late distal tubule (or connecting duct) and all parts of the collecting duct. It also increases the urea permeability of the inner medullary collecting duct.

Detailed explanation-4: -ADH will concomitantly increase the permeability of water by opening water channels (aquaporins), which will allow for water to diffuse from inside the tubules to the interstitium and ultimately to the peritubular capillaries and blood.

Detailed explanation-5: -Final answer: Hence, ADH controls the water permeability of Distal convoluted tubules.