Adrenal glands: These are endocrine glands located above the kidneys that produce a variety of hormones including adrenaline and cortisol.
Epinephrine (Adrenaline): A hormone secreted by the adrenal medulla that increases heart rate, muscle strength, blood pressure, and sugar metabolism in response to stress.
Norepinephrine (Noradrenaline): A hormone produced by the adrenal medulla that plays a key role in increasing blood pressure and heart rate when under stress