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Sanjay is sitting in the exam hall. Befo...

Sanjay is sitting in the exam hall. Before the start of the exam, he sweats a lot, with increased rate of heart beat. Why does this condition occur?

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It is due to secretion of Epinephrine and Norepinephrine as it produced during conditions of stress and emotion. They are called as "Emergency hormones" or fight, fright and fight hormone.
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