ANATOMY

Detailed explanation-1: -Antidiuretic hormone (ADH) is a chemical produced in the brain that causes the kidneys to release less water, decreasing the amount of urine produced. A high ADH level causes the body to produce less urine. A low level results in greater urine production.

Detailed explanation-2: -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.

Detailed explanation-3: -Sensors in your body detect when your blood volume changes and needs more ADH. These sensors talk to your brain and the pituitary gland releases ADH into your bloodstream. When ADH makes it to your kidneys, it signals them to conserve water and produce more concentrated urine.

Detailed explanation-4: -The main action of ADH in the kidney is to regulate the volume and osmolarity of the urine. Specifically, it acts in the distal convoluted tubule (DCT) and collecting ducts (CD).

Detailed explanation-5: -[2] Therefore, slight elevations in osmolarity result in the secretion of ADH. ADH then acts primarily in the kidneys to increase water reabsorption, thus returning the osmolarity to baseline.