Here are the essential concepts you must grasp in order to answer the question correctly.
Antidiuretic Hormone (ADH)
Antidiuretic Hormone, also known as vasopressin, is a peptide hormone produced by the hypothalamus and released by the posterior pituitary gland. Its primary function is to regulate water balance in the body by promoting water reabsorption in the kidneys, specifically in the collecting ducts. This action helps to concentrate urine and reduce water loss, thereby maintaining hydration and blood volume.
Recommended video:
Osmolarity
Osmolarity refers to the concentration of solutes in a solution, which affects the movement of water across cell membranes. In the context of blood, osmolarity is crucial for maintaining fluid balance and proper physiological function. When ADH increases water reabsorption, it dilutes the solute concentration in the blood, thereby lowering osmolarity and helping to prevent dehydration.
Recommended video:
Kidney Function in Water Regulation
The kidneys play a vital role in regulating water balance through processes such as filtration, reabsorption, and secretion. When ADH is present, it enhances the permeability of the kidney's collecting ducts, allowing more water to be reabsorbed back into the bloodstream. This mechanism not only conserves water but also influences blood pressure and osmolarity, ensuring homeostasis within the body.
Recommended video:
13:06
