A. 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 a natural response of the body to atypical situation/ stressful environmental stimuli. The stress hormone such as cortisol and adrenaline is significant in ‘fight or flight response’ and works to the benefit of the body in short periods by reving up your body. However, perpetual stress can be detrimental to the body's health and cause symptoms such as insomnia, anxiety, and depression.

In the ‘fight or flight’ mode during an emergency, the response of the cardiovascular system to the stress hormones is to increase blood flow by increased heart rate and constricted vessels. The respiratory system response is by increasing breathing rate and depth of the breaths.

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