Your body doesn't know the difference between running from a lion and freaking out about a research deadline! The fight-or-flight response kicks in for physical threats AND academic panic alike. Your adrenal glands flood your system with stress hormones (glucocorticoids), your liver dumps glucose into your bloodstream, and your thigh muscles get ready for action—whether you need to sprint away from danger or just sit at your desk hyperventilating over that paper due tomorrow. Evolution gave us this amazing survival mechanism, but didn't quite account for modern stressors. The body's like "DANGER DETECTED! PREPARE FOR BATTLE!" while your brain's going "I just need to format these citations, calm down!"