In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus.n 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus.
Norepinephrine, also called noradrenaline, is an organic chemical in the catecholamine family that functions in the human brain and body as a hormone and neurotransmitter.n the most basic terms, the function of norepinephrine is to mobilize the brain and body for action. Norepinephrine release is lowest during sleep, rises during wakefulness, and reaches much higher levels during situations of stress or danger, in what has been called the fight-or-flight response.
norepinephrine (NE). [norâ²nÃ´râ²epinef]. rin an adrenergic (hormone) catecholamine that acts to increase blood pressure by vasoconstriction but does not affect cardiac. Output it is synthesized by the adrenal, medulla the peripheral sympathetic, nerves and the central nervous. system