Role of Antidiuretic Hormone (ADH) in Osmoregulation

• Production: ADH is produced by the pituitary gland.
• Function: It reduces urine volume by promoting water reabsorption in kidney tubules.
• Osmoregulation: The process of regulating the concentration of useful substances (water and salts) in the body. Osmotic pressure in blood and tissue fluid is controlled to maintain homeostasis.
• Detection: Osmoreceptor cells in the brain detect changes in water and salt concentrations, adjusting ADH levels to regulate water reabsorption.

Roles of Aldosterone in Osmoregulation

• Production: Aldosterone is produced in the cortex of the adrenal gland.
• Function: It influences salt reabsorption in the kidneys.
• Action: Released into the loop of Henle, it helps reabsorb salts back into the blood. When blood salt levels are low, aldosterone increases salt reabsorption to prevent low plasma volume.