Since diffusion does not require the cell to expend ATP, therefore, diffusion is considered a type of PASSIVE TRANSPORT.
PASSIVE TRANSPORT:
- Passive transport is a form of cellular transport in which substances move without the need of energy in form of ATP.
- The types of passive transport we have are diffusion, osmosis, facilitated diffusion etc.
- Diffusion is referred to as the movement of gas from a region of higher concentration to a region of lower concentration.
- Diffusion occurs down a concentration gradient, hence, it does not require energy (ATP) input to occur.
- Therefore, diffusion is considered a type of PASSIVE TRANSPORT.
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