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2014-11-14 03:39:27
Here's how the stress system works. Say you're studying for difficult exams and you find out that material was included and you only have 2 hours for the test.
When you experience sudden stress or danger your brain instantly signals your body to turn out a hormone called cortisol. It in turn relays the message throughout the body to use you for a life-saving response. Your heart starts speeding up increasing the cardiac output. You become highly attentive and alert even vigilant. Blood vessels constrict and divert the flow of blood from leisurely processes such as digestion to fast-acting muscles. me
2014-11-14 03:40:05