did anyone discover this?
Ulf von Euler
Norepinephrine
Ulf von Euler 
what role does the neurotransmitter norepinephrine have in the cardiac system It increases heart rate and blood pressure what is norepinephrine? It is an organic chemical in the catecholamine family that functions in the brain and body as a hormone and neurotransmitter. what kind of a structure does this organ have? Its structure differs from that of epinephrine only in that epinephrine has a methyl group attached to its nitrogen, whereas the methyl group is replaced by a hydrogen atom in norepinephrine. does it affect our sleep? Can cause sleeplessness does that chemical have any affects on our skin? It activates the afferent sensory neuron does it go through degradation? Yes, in mammals, norepinephrine is rapidly degraded to various metabolites.
wiki:15908159
Norepinephrine [SEP] History
Early in the twentieth century Walter Cannon, who had popularized the idea of a sympathoadrenal system preparing the body for fight and flight, and his colleague Arturo Rosenblueth developed a theory of two "sympathins", "sympathin E" (excitatory) and "sympathin I" (inhibitory), responsible for these actions. The Belgian pharmacologist Zénon Bacq as well as Canadian and US-American pharmacologists between 1934 and 1938 suggested that noradrenaline might be a sympathetic transmitter. In 1939, Hermann Blaschko and Peter Holtz independently identified the biosynthetic mechanism for norepinephrine in the vertebrate body. In 1945 Ulf von Euler published the first of a series of papers that established the role of norepinephrine as a neurotransmitter.