As I sit here typing away at my computer, I become increasingly aware of the deadline for finishing this article. Then for no apparent reason, my focus changes to the countless other tasks that need to get done this week. My list of things to do is growing by the minute. This is going to be a very busy week. Of course, next week will be just as busy, if not more so. How will it all get done? When will I get caught up?
The way that the human body responds to stress has developed over the course of human evolution to help primitive man to deal with physical challenges. Thus, the stress response is designed to make the body ready for intense action, either combat or escape. This response, known as the fight-or-flight response, involves the production of stress hormones (cortisol, norepinephrine, and epinephrine – also called adrenaline) from the adrenal glands. When this happens, heart rate and blood pressure soar to get more blood to the brain, heart, and skeletal muscles, while blood is shunted away from the digestive tract. This provides for maximum alertness and increases physical strength or speed, but in the process also suppresses digestion. Blood sugar levels rise to supply more fuel for energy. Blood clotting occurs more quickly, preventing blood loss from cuts or internal bleeding. The brain shuts off sleep centers and turns wakefulness centers into high gear. Muscle tone and tension increase everywhere in the body and breathing rate increases.
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