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    Did you mean Sympathetic Nerves?
    GlossarySympathetic Nerves

    control involuntary responses to stress, like increased heart rate

    Sympathetic nerves are part of the autonomic nervous system, which controls involuntary body functions. They prepare the body for "fight or flight" responses by increasing heart rate, dilating airways, and redirecting blood flow to muscles. This system helps the body respond quickly to stressful situations.

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