Abnormal tendon reflex

Antidiuretic hormone (also known as vasopressin) is a 9-peptide hormone secreted by nerve cells in the supraoptic nucleus and paraventricular nucleus of the hypothalamus. It is released after reaching the neural pituitary via the hypothalamic-pituitary tract. Its main role is to improve the permeability of distally curved tubules and collection tubes to water, and to promote water absorption. It is a key regulating hormone for urine concentration and dilution. In addition, the hormone also enhances the permeability of the inner medullary collecting duct to urea. After drinking plenty of water, the blood is diluted, the osmotic pressure of the crystal is reduced, and the antidiuretic secretion is reduced.