ANATOMY

Detailed explanation-1: -When a hyposmotic fluid is lost from the ECF, the volume of the ECF decreases, and the osmolarity increases. When the osmolarity in the ECF rises compared to ICF, water moves by osmosis from the ICF into the ECF.

Detailed explanation-2: -Several different factors mediate the redistribution of water between the two ECF compartments: hydrostatic pressure, oncotic pressure, and the osmotic force of the fluid.

Detailed explanation-3: -Water will move by osmosis from the side where its concentration is high (and the concentration of solute is low) to the side of the membrane where its concentration is low (and the concentration of solute is high).

Detailed explanation-4: -The two fluid compartments of the body, intracellular fluid and extracellular fluid, are in osmotic equilibrium. Water moves by facilitated diffusion through aquaporin channels across cell membranes.

Detailed explanation-5: -Fluid is moved by a combination of osmotic and hydrostatic pressures. The osmotic pressure results from differences in solute concentrations across cell membranes. Hydrostatic pressure results from the pressure of blood as it enters a capillary system, forcing some fluid out of the vessel into the surrounding tissues.