New News Biology #5

Diffusion

Diffusion (solutions/gases)

The spreading out of particles from an area of high concentration, to an area of lower concentration.

Note: the diffusion process is completely random

Diffuse through cell membrane

the cell membrane is PARTIALLY PERMEABLE (only some particles can pass though them)

For example, amino acids, oxygen, water, glucose

Faster diffusion depends on the following factors:

Larger concentration gradient (inside the cell)

Higher temperature (inside the cell)

The cell has a large surface area