What is osmosis?

Osmosis is specifically defined as the diffusion of water across a semipermeable membrane. This process occurs when there is a difference in water concentration on either side of the membrane, causing water to move from an area of lower solute concentration (where there is more water) to an area of higher solute concentration (where there is less water). The semipermeable nature of the membrane allows water molecules to pass through while preventing certain solute molecules from doing so, leading to an equalization of solute concentrations on both sides of the membrane over time.

This concept is crucial in various biological systems, such as in maintaining cell turgor pressure in plant cells or regulating the movement of fluids in and out of animal cells. It plays a significant role in processes like nutrient absorption, waste removal, and overall homeostasis within living organisms. Understanding osmosis is fundamental in comprehending how cells interact with their environment and maintain their internal conditions.