# Chemotaxis --- **Chemotaxis** is a form of [[unicellular cell signaling]] that causes the movement of a cell (as an organism or as part of a multicellular organism) towards or away from a particular substance. ## Chemotaxis in Single Cellular Organisms Single cell organisms can use chemotaxis as a method of "smelling" their environment and sensing [[concentration gradient|concentration gradients]] of substances like food or toxins, and move accordingly ## Chemotaxis in Multicellular Organisms Multicellular organisms can use chemotaxis to summon [[white blood cells]], thereby inducing [[inflammation]]. ___