Sympathetic nervous system activation in concert with adrenal gland catecholamine secretions such as ____ (known also as adrenalin)and ____ (known also as noradrenalin)prime the body to physically fight off threats to safety or to flee from these threats through such activities as increasing cardiac output and blood pressure that transit additional blood to the brain and large muscles of the body where the blood is most acutely needed.

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Adrenal gland catecholamine secretions such as epinephrine (adrenaline) and norepinephrine (noradrenaline) are responsible for activating the sympathetic nervous system, which prepares the body to deal with threats by increasing cardiac output and blood pressure to supply blood to the brain and large muscles. Cortisol and glucocorticoids are also stress hormones, but they do not directly activate the sympathetic nervous system or adrenal gland secretions. Ephedrine and norephedrine are not natural hormones, and their role in the body's stress response is not well-established.

Sympathetic Nervous System Activation in Concert with Adrenal Gland Catecholamine