What Is a Passive Process in Diffusion

Passive diffusion is the process by which molecules diffuse from a region of higher concentration to a region of lower concentration. It is the most important mechanism for passage of drugs through membranes.

What are passive processes?

Passive transport are processes such as diffusion and osmosis, where energy is NOT required, as the substance moves across the concentration gradient, meaning it moves from a high concentration to a low concentration.

Why is diffusion called a passive process?

Diffusion is a passive process of transport. … Diffusion expends no energy. Rather the different concentrations of materials in different areas are a form of potential energy, and diffusion is the dissipation of that potential energy as materials move down their concentration gradients, from high to low.