GENERAL HISTOLOGY

Detailed explanation-1: -As ADH (which is also known as vasopressin) causes direct water reabsorption from the kidney tubules, salts and wastes are concentrated in what will eventually be excreted as urine. The hypothalamus controls the mechanisms of ADH secretion, either by regulating blood volume or the concentration of water in the blood.

Detailed explanation-2: -ADH is stored in neurons within the hypothalamus. These neurons express osmoreceptors that are exquisitely responsive to blood osmolarity and respond to changes as little as two mOsm/L. [2] Therefore, slight elevations in osmolarity result in the secretion of ADH.

Detailed explanation-3: -The hypothalamus of a dehydrated person also releases antidiuretic hormone (ADH) through the posterior pituitary gland.

Detailed explanation-4: -When plasma osmolality increases, osmoreceptors in the hypothalamus stimulate the release of ADH in blood, thus increasing water reabsorption and equilibrating plasma osmolality.