Answer:
sympathetic; parasympathetic
Explanation:
When facing down a deadly animal, at the edge of a cliff, impending deadline or thing that poses a threat to our safety, our bodies release a physical stress response that prepares us to either fight or flees the scene. The nervous system responsible for that response to either "fight-or-flee" response is driven by the sympathetic nervous system, a well-coordinated network of brain structures, nerves and hormones that, if disrupted may cause imbalance, and can result in terrible complications. While the parasympathetic nervous system helps conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.
