ANATOMY

Detailed explanation-1: -Vasopressin (antidiuretic hormone) acting at V2 receptors enhances water reabsorption by increasing aquaporin-2 channels in the renal collecting duct.

Detailed explanation-2: -ADH then acts primarily in the kidneys to increase water reabsorption, thus returning the osmolarity to baseline.

Detailed explanation-3: -A hormone that helps blood vessels constrict and helps the kidneys control the amount of water and salt in the body. This helps control blood pressure and the amount of urine that is made. Antidiuretic hormone is made by a part of the brain called the hypothalamus and is secreted into the blood by the pituitary gland.

Detailed explanation-4: -B Antidiuretic Hormone Special sensors in the hypothalamus recognize increases in plasma osmolality, and the normal response is increased thirst to enhance water intake and the release of ADH, which increases water reabsorption by the renal collecting tubules.