Question

ADH is synthesised by ___________, released by _____________ and acts on __________.

• A. Hypothalamus, neurohypophysis, PCT
• B. Hypothalamus, neurohypophysis, DCT and collecting duct
• C. Hypothalamus, adenohypophysis, PCT
• D. Hypothalamus, adenohypophysis, loop of Henle

Answer 1

Answer: (B)

Vasopressin, also known as arginine vasopressin (AVP), antidiuretic hormone (ADH), or argipressin, is a neurohypophysial hormone found in most mammals. Its two primary functions are to retain water in the body and to constrict blood vessels. Vasopressin regulates the body's retention of water by acting to increase water reabsorption in the collecting ducts of the kidney nephron. Vasopressin is a peptide hormone that increases water permeability of the kidney's collecting duct and distal convoluted tubule increases peripheral vascular resistance, which in turn increases arterial blood pressure. It plays a key role in homeostasis, by the regulation of water, glucose, and salts in the blood. It is derived from a preprohormone precursor that is synthesized in the hypothalamus and stored in vesicles at the posterior pituitary.