Diabetapedia definition: Under stress conditions, from either physical or emotional causes, impulses from the sympathetic nervous system to most visceral effectors (including cardiac muscles, blood vessels, abdominal organs, etc.) increase greatly, causing immediate physiological changes related to making the body able to cope strenuously with the stress situation. This reaction is commonly called the “fight or flight” reaction.
Reference: Textbook of Anatomy & Physiology by Anthony & Koithoff
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