what is the use of adrenaline in our body
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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).
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Refer the pic . If the chemical signal were to be sent as well it will reach all cells of the body and provide a wide ranging changes needed
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