quote from wikipedia (not sure how accurate since any fucker can edit, but anway, just curious as to what this means)
"As a stress hormone, norepinephrine affects parts of the brain where attention and responding actions are controlled. Along with epinephrine, norepinephrine also underlies the fight-or-flight response, directly increasing heart rate, triggering the release of glucose from energy stores, and increasing blood flow to skeletal muscle.
However, when norepinephrine acts as a drug it will increase blood pressure, triggering a compensatory reflex that overcomes its direct stimulatory effects on the heart. "
Why is it described as acting as both a hormone and a drug? Why would it act in 2 different ways and what would make it do one thing or another?
"As a stress hormone, norepinephrine affects parts of the brain where attention and responding actions are controlled. Along with epinephrine, norepinephrine also underlies the fight-or-flight response, directly increasing heart rate, triggering the release of glucose from energy stores, and increasing blood flow to skeletal muscle.
However, when norepinephrine acts as a drug it will increase blood pressure, triggering a compensatory reflex that overcomes its direct stimulatory effects on the heart. "
Why is it described as acting as both a hormone and a drug? Why would it act in 2 different ways and what would make it do one thing or another?