Final answer:
Norepinephrine can both stimulate and inhibit various systems in the body at the same time.
Step-by-step explanation:
Epinephrine and norepinephrine, also known as the 'fight or flight' hormones, are released by the adrenal medulla and nervous system, respectively, under extreme stress. These hormones work by binding to adrenergic receptors in the body. Norepinephrine can both stimulate and inhibit various systems in the body at the same time, depending on the specific receptors it binds to. For example, it can stimulate the heart to beat faster while constricting blood vessels to increase blood pressure.