Describe what stress is and how it affects your body. address physiological fight-or-flight responses and how those responses relate to your cardiorespiratory and muscular systems.

Stress is what causes anxiety or nervousness. That being said there is good stress and bad stress. Stress can affect your body by causing lack of sleep, or restlessness. Fight-or-flight is affected by stress. The fight option increases the testosterone and dopamine levels in your body, while the Flight option decreases them.
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Answerbipolar disorder; i believe this is correct, plz check first;

The answer you're looking for is washing your hands. "at this late date, we all expect our doctors to wash their hands before examining us or performing an operation in order to prevent the spread of infection. surprisingly, physicians did not begin to acknowledge the lifesaving power of this simple act until 1847.it was then that dr. semmelweis began exhorting his fellow physicians at the famed vienna general hospital (allgemeines krankenhaus) to wash up before examining women about to deliver babies. his plea was far more than aesthetic; it was a matter of life and death and to prevent a deadly malady known as “childbed” or puerperal (from the latin words for child and parent) fever."