i think it is homeostasis
it is called a concentration gradient.
diffusion
The concentration gradient is the difference in the concentration of a substance from one location to another. The plasma membrane controls the traffic .
Concentration Gradient
This is called the osmotic gradient.
Difference in concentration of a substance at 2 areas is called gradient , and it allows diffusion .
concentration
concentration
The transport of a substance across the cell membrane against its concentration gradient is called active transport.
the answer to that is concentration!!
diffusion
This is a concentration gradient.But because the phenomenon of diffusion concentration will become the same everywhere.