An adrenaline rush is a physiological reaction that occurs in response to stress, danger, excitement, or other intense emotions. It is triggered by the release of adrenaline (epinephrine), a hormone and neurotransmitter produced by the adrenal glands. This rush is part of the fight-or-flight response, which is the body's natural reaction to perceived threats.

Here’s what happens during an adrenaline rush:

1. Adrenaline Release
When you encounter a stressful or exciting situation, your brain signals the adrenal glands to release adrenaline into the bloodstream.
This increases heart rate, blood pressure, and breathing rate to prepare the body for quick action.
2. Increased Blood Flow
Adrenaline causes blood vessels to constrict in certain areas (like the digestive system) and dilate in others (like the muscles and brain), ensuring more oxygen and energy are delivered to vital organs and muscles.

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