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Sympathetic Arousal

When an individual perceives a stressor as threatening, the sympathetic branch of the autonomic nervous system is activated by the hypothalamus. Sympathetic nerves connect the brain with many organs of the body, such as the heart and various glands including the two adrenal glands

Adrenal Medulla

Adrenal glands sit on top of the kidneys and are made up of two components: the adrenal medulla is the central part of the gland and the adrenal cortex surrounds the medulla. Sympathetic arousal stimulates the adrenal medulla to release the hormones into the bloodstream

Adrenaline