Osmotic balance between body compartments

Osmotic balance between body compartments refers to the physiological process by which water and solute distribution are regulated across the major compartments of the body, such as intracellular fluid (ICF) and extracellular fluid (ECF). This process relies on principles such as osmosis, hydrostatic pressure, and osmotic (solute) gradients across semi-permeable membranes, ensuring that the osmolarity remains equal across compartments and total body water and electrolyte concentrations remain within narrow physiological limits. It is critical for normal cellular function, tissue perfusion, and organ system biology, and is mediated by integrated mechanisms including the kidney, neuroendocrine signals (e.g., antidiuretic hormone, osmoreceptors), and physical properties of membranes—not by a single druggable molecular target like a receptor, transporter, or enzyme[1][2][3][4][5][6][7][8][9].

Other names

Osmotic balanceOsmoregulationFluid balance between compartments