Answer: to defend itself
Explanation:
This natural reaction prepares you to either flee or protect yourself in dangerous situations. Your heart rate increases, your adrenal gland releases cortisol (a stress hormone), and you receive a boost of adrenaline, which increases energy. This fight-or-flight response occurs in the alarm reaction stage.
It gets good food by excersicing, eating good food, and drinking lots of water. Eat a healthy diet, and lots of protein. Drinking water helps every part of your body. Drink 8-10 glasses or more a day. Excersise to stay strong, and able to do things.
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Personal consequences
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Cholesterol (especially LDL*) tend to get into macrophages which migrate into blood vessels. Macrophages with cholesterol cannot get out of the vessels and stay there which causes a lipid mass in arteries. That causes atherosclerosis.
