transport in cells- diffusion

Diffusion

The movement of particles from an area of high concentration to an area of low concentration

Although particles move in both directions….

There will be a net movement from high to low

Particles will end up ____ spread throughout the liquid/gas but will continue to ___

Evenly, move

What are three examples of diffusion in biological systems

In a leaf, in the lungs, in the liver

How is diffusion used in leafs?

CO2 moves into the palisade mesophyll cells via diffusion. O2 also moves out of the cells via diffusion.

How is diffusion used in the lungs?

CO2 diffuses from high concentrations in the blood too low concentrations in the alveolus. O2 diffusers from high concentrations in the alveolus to low concentrations in the blood vessel

How is diffusion used in liver cells?

Urea from liver cells is diffuse into blood vessels. Urea is filled from the blood via liver cells