This short animation briefly explains simple diffusion across a membrane. If you'd like a more in-depth explanation, you can check out the longer version here: [ Ссылка ]
Transcript:
One of the most important processes in biology is diffusion. In diffusion, particles move from high concentration to low concentration. Another way to say this is that they move DOWN THEIR CONCENTRATION GRADIENT. This process is passive, meaning that NO energy is used by the cell to make it happen.
Diffusion happens because molecules are in constant random motion.
Notice that the molecules move around randomly in every direction, but that overall they move from high to low concentration until there are roughly equal concentrations on both sides of the membrane, a condition known as dynamic equilibrium.
Credits:
Music: [ Ссылка ]
