During the alarm stage of stress, your body releases adrenaline (also known as epinephrine) as part of the body's "fight or flight" response. This response is a physiological reaction to perceived threats or danger and is controlled by the endocrine system. The release of adrenaline comes from the adrenal glands, which are located on top of the kidneys. When you encounter a stressor, the hypothalamus in the brain signals the adrenal medulla to release adrenaline into the bloodstream. This hormone helps to prepare the body to respond to the stressor by increasing heart rate, enhancing energy production, improving blood flow to muscles, and heightening alertness, among other effects.
During the alarm stage of stress your body releases a chemical called adrenaline which is part of what
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