If you stand to make your maiden speech before a large audience, your mouth dries up and heart rate increases. What brings about these changes ?

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Solution

Adrenaline is the hormone which prepares the body to meet any emergency situation. Adrenaline makes the heart beat faster. At the same time, it stimulates the constriction of the arterioles of the digestive system reducing the blood supply of the digestive system which makes the mouth dry

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Standard X Biology

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