There are two main categories of cellular transport:
* Passive transport: This type of transport does not require energy from the cell to move substances across the cell membrane. It relies on the concentration gradient (the difference in concentration of a substance across the membrane) and the properties of the membrane itself. Examples include diffusion, osmosis, and facilitated diffusion.
* Active transport: This type of transport requires energy from the cell to move substances across the cell membrane. This is often necessary to move substances against their concentration gradient (from a low concentration area to a high concentration area). Examples include the sodium-potassium pump and endocytosis/exocytosis.
So, while "cellular transport" is the umbrella term, the specific process used depends on the type of material and the direction of movement.
