HEALTH & FITNESS TERMS DIRECTORY
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AdrenalinCalled epinephrine in the U.S., this is a substance secreted into the bloodstream and reacted to by specialized receptors throughout the body, initiating a "code blue" or flight or fight response. Many receptors are a regular part of sympathetic function, and respond to their own local relative, norepinephrine or noradrenalin, in the course of normal autonomic nervous system interplay.
