You are probably referring to the "concentration gradient" on which substances travel during osmosis and diffusion.
Concentration gradient- The change in concentration of a substance over distance or across a membrane.
AKA
Concentration= amount Gradient = difference in concentration from one area to another
Concentration gradient- The change in concentration of a substance over distance or across a membrane.
AKA
Concentration= amount Gradient = difference in concentration from one area to another
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In vector calculus, the gradient of a scalar field is a vector field that points in the direction of the greatest rate of increase of the scalar field, and whose magnitude is that rate of increase. In the contexts of linear algebra and modern geometry the gradient is sometimes treated as a covector.[1]
A generalization of the gradient for functions on a Euclidean space that have values in another Euclidean space is the Jacobian. A further generalization for a function from one Banach space to another is the Fréchet derivative.
A generalization of the gradient for functions on a Euclidean space that have values in another Euclidean space is the Jacobian. A further generalization for a function from one Banach space to another is the Fréchet derivative.