What is the definition of osmosis?

The definition of osmosis specifically refers to the movement of water across a selectively permeable membrane. This process occurs in response to differences in solute concentration, leading water to move from areas of lower osmolarity (where there are fewer solute particles) to areas of higher osmolarity (where there are more solute particles). This movement continues until there is an equilibrium in solute concentrations on both sides of the membrane.

In the context of biological systems, osmosis is vital for maintaining cellular homeostasis, influencing cell volume, and regulating various physiological functions such as kidney function and the movement of fluids in and out of cells. Understanding osmosis is crucial for nursing practice, as it directly relates to fluid balance in patients and impacts the treatment of various conditions associated with dehydration and overhydration.