What is a diffusion gradient in biology?

Let's say you drop a “Bath Bomb” into the center of a tub. In the center you would find a lot of bubbles but as you travel farther away from the center and close to the edges you find less bubbles. read more

In cells think of it as the opposite, the diffusion gradient is the gradual decreasing of a substance as you travel away from the source. Oxygen enters the membrane of the cell in a very high concentration but as you travel closer to the center of the cell, you will find less and less oxygen molecules, or ‘bubbles’. read more

The concentration gradient refers to the gradual change in the concentration of solutes present in a solution between two regions. In biology, a gradient results from an unequal distribution of ions across the cell membrane. read more