A biochemical cascade is a series of chemical reactions in which the products of one reaction are consumed in the next reaction. There are several important biochemical cascade reactions in biochemistry, including the enzymatic cascades, such as the coagulation cascade and the complement system, and the signal transduction cascades which ultimately cause electric potentials to travel through nerves into the brain where they are interpreted as signals in such events as vision and smell. For other uses, see Chemical reaction (disambiguation). ... Biochemistry (from Greek: , bios, life and Egyptian kēme, earth[1]) is the study of the chemical processes in living organisms. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... This article is about the clotting of blood. ... A complement protein attacking an invader. ... In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as... This article does not cite any references or sources. ... A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin. ... Human brain In animals, the brain (enkephale) (Greek for in the skull), is the control center of the central nervous system, responsible for behavior. ... In psychology, visual perception is the ability to interpret visible light information reaching the eyes which is then made available for planning and action. ... Olfaction (also known as olfactics) refers to the sense of smell. ...