Which division of the autonomic nervous system is responsible for arousing the body and mobilizing energy during stressful situations?

The sympathetic nervous system is the division of the autonomic nervous system that is primarily responsible for preparing the body to respond to perceived threats or stressful situations. When activated, it triggers a series of physiological changes collectively known as the "fight-or-flight" response. These changes include an increase in heart rate, expanded airways to improve oxygen intake, dilation of pupils, and a release of glucose for quick energy, among other effects.

This system is vital in situations requiring immediate energy and alertness, ensuring that the body can respond effectively to danger. It contrasts with the parasympathetic nervous system, which promotes a state of rest and conserves energy, focusing on functions like digestion and relaxation. The somatic nervous system is involved in voluntary control of body movements through skeletal muscles, and the enteric nervous system regulates gastrointestinal functions. Therefore, the sympathetic nervous system's role in arousing the body and mobilizing energy during stress is crucial to understanding how our bodies respond to threats.