Editing Active transport (section)

== Active cellular transportation (ACT) ==

Unlike [[passive transport]], which uses the [[kinetic energy]] and natural [[entropy]] of molecules moving down a gradient, active transport uses cellular energy to move them against a gradient, polar repulsion, or other resistance. Active transport is usually associated with accumulating high concentrations of molecules that the cell needs, such as [[ion]]s, [[glucose]] and [[amino acid]]s. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into [[root hair]] cells of plants.<ref name="Active Transport Process">{{cite web|title=The importance of homeostasis |work=Science |publisher=me |url=http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/importancerev6.shtml |access-date=23 April 2013}}</ref>