Problem: The nervous system serves as the body's primary communication network, consisting of two main components: the central nervous system (brain and spinal cord) and the peripheral nervous system (nerves extending throughout the body). When you encounter a stressful situation, your brain's alarm system - the amygdala - sends an urgent signal to the hypothalamus. The hypothalamus then activates the "fight or flight" response by signaling the adrenal glands to release a surge of hormones, most notably cortisol and adrenaline. Adrenaline rapidly increases your heart rate and blood pressure while providing a quick burst of energy to either confront or escape a perceived threat. Cortisol, the primary stress hormone, increases blood sugar levels, enhances glucose utilization in the brain, and improves the availability of tissue-repair substances. This represents a highly effective, short-term survival mechanism. Rewrite and shorten. Need Assignment Help?