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The affect of psychological stress on the heart rate.
Introduction:
The human body is incredible machinery that can adjust to stressful situations and react in a “fight-or flight” manner by temporarily shutting off nonessential, at the moment, immune and digestive systems. When the body is ready for a challenge, heart rate increases, blood pressure rises and glucose production intensifies to supply large amounts of energy. These metabolic changes are caused by release of stress hormones (catecholamine and epinephrine) by adrenal glands. When stressful situation goes away, body returns to its normal state. But if the stress is chronic, the mechanism remains activated and organism is exposed to the high level of hormones for the long periods of time. As a result, blood pressure and heart rate are constantly elevated, which can take a toll on the cardiovascular system and cause a serious heart disease and even a stroke. (1)
There are many studies on humans and animals......
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Title: The Affect Of Psychological Stress On The Heart Rate.
Approximate Word Count: 1365
Approximate Pages: 6 (250 words per double-spaced page)
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