An antagonistic occurrence occurs when the sympathetic and parasympathetic divisions cooperate to produce an united result.
The opposing sympathetic and parasympathetic systems, which regulate autonomic reactions, mediate them. The "fight or flight" response is triggered by the sympathetic nervous system, whereas the "rest and digest" response is triggered by the parasympathetic nervous system. The peripheral nervous system's autonomic nervous system controls physiological functions that are carried out automatically, such as digestion, blood pressure, respiration, and sexual desire.
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