in Chemical Coordination and Regulation (Endocrine System) by

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Epinephrine (also called adrenaline) and norepinephrine - two amino acid-based hormones are secreted by the inner portion of the adrenal glands. These hormones are released in emergency situation; whenever the sympathetic nervous system is activated.

Epinephrine - stimulates pulses and increases blood pressure, stimulates the metabolism in emergencies, decreases insulin secretion

Norepinephrine (generally excites smooth muscle) - stimulates the functions of the circulatory and respiratory systems:  attention, consciousness, control of body temperature etc.

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