BIOL 1107 Lecture Notes - Extracellular Fluid, Osmoregulation, Osmotic Concentration
Document Summary
Be able to define osmolarity, osmosis, and compare/contrast osmoconformers/osmoregulators. Identify and describe the parts of the human urinary system. Identify and describe the parts of the human nephron. Be able to explain what tubule filtration, reabsorption, secretion, and excretion are, where they occur in the nephron, and how these processes contribute to osmoregulation. The amount of solute per liter of solution. In living things, the solution is water. The solute is ions, molecules, intracellular proteins. Living things contain water, are surrounded by water, and constantly exchange water with the extracellular / external environment. Osmoregulation is the control of water and ion balance. In a multicellular organism, the extracellular fluid includes interstitial fluid and blood. You can predict the direction of passive water movement by remembering the relationship between water and solute low solute, high water high solute, low water. Animals keep their intracellular and extracellular fluids isosmotic but the nature of the solutes in these 2 areas can differ.
