What occurs during diffusion?

During diffusion, particles naturally move from areas of high concentration to areas of low concentration. This process occurs as a result of the random motion of particles, which causes them to spread out and fill a space evenly over time. The movement continues until there is an equal concentration of particles throughout the area, demonstrating the tendency of particles to achieve equilibrium. This fundamental concept is essential in understanding various biological processes, such as the exchange of gases in the lungs and nutrient absorption in cells.

The choice of movement from high to low concentration is key because it highlights the driving force of diffusion, which is the gradient established by differing concentrations. Understanding this process is crucial for many concepts in biology, particularly those related to cellular functions and transport mechanisms.