what is the work of adrenaline and nor adrenaline hormone?
Answers
Epinephrine
When the brain perceives danger, the amygdala triggers the hypothalamus to activate the autonomic nervous system.
Signals from the autonomic nervous system stimulate the adrenal gland to start pumping epinephrine into the bloodstream. People often refer to this surge of epinephrine as an adrenaline rush or the fight or flight response.
Epinephrine affects the heart, lungs, muscles, and blood vessels. Its release into the bloodstream brings about several physiological changes, such as:
increased heart rate and blood flow
faster breathing
raised blood sugar levels
increased strength and physical performance
Non epinephrine
The adrenal medulla produces norepinephrine in response to low blood pressure and stress. Norepinephrine promotes vasoconstriction, which is a narrowing of the blood vessels, and this increases blood pressure.
Like epinephrine, norepinephrine also increases the heart rate and blood sugar levels.
Explanation:
Key actions of adrenaline include increasing the heart rate, increasing blood pressure, expanding the air passages of the lungs, enlarging the pupil in the eye (see photo), redistributing blood to the muscles and altering the body's metabolism, so as to maximise blood glucose levels (primarily for the brain).