How is osmosis defined?

Osmosis is specifically defined as the diffusion of water across a semi-permeable membrane. This process occurs when water moves from an area of lower solute concentration to an area of higher solute concentration, seeking to equalize the solute concentrations on both sides of the membrane. The key aspect that makes osmosis unique is its focus on water movement and the behavior of water molecules in response to solute concentrations, which is crucial for maintaining cellular homeostasis and proper physiological functioning.

A semi-permeable membrane is crucial in this process as it allows water molecules to pass through while restricting the movement of certain solutes. This selective permeability is fundamental in various biological systems, influencing processes such as nutrient absorption, waste removal, and overall fluid balance in organisms. Understanding osmosis is essential in fields such as biology and medicine, as it plays a significant role in cell physiology and the impact of environmental changes on cells.