Harmless and beneficial bacteria far outnumber harmful varieties. Thousands of bacterial species live commensally in humans, and many provide health benefits to humans, aiding in digestion, for example, or helping to prevent the establishment of colonies of pathogenic bacteria.armless and beneficial bacteria far outnumber harmful varieties. Thousands of bacterial species live commensally in humans, and many provide health benefits to humans, aiding in digestion, for example, or helping to prevent the establishment of colonies of pathogenic bacteria.
ADH (Antidiuretic Hormone) The brain and kidneys regulate the amount of water excreted by the body. When the blood volume is low, the concentration of solutes in the blood is high. When the hypothalamus senses this low blood volume and increased serum osmolality it synthesizes ADH, a small peptide molecule.
ADH is also called arginine vasopressin. It is a water-regulating hormone made by the hypothalamus (in the brain), and stored in the posterior pituitary gland. ADH is the chemical that tells the kidneys how much water to conserve.ADH constantly regulates and balances the amount of water in the blood.Higher water concentration increases the volume and pressure of the blood. Osmotic sensors and baroreceptors work in tandem with ADH to maintain water metabolism.DH is the chemical that tells the kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in the blood. Higher water concentration increases the volume and pressure of the blood. Osmotic sensors and baroreceptors work in tandem with ADH to maintain water metabolism.