The vomiting reflex is mediated by the medulla.

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The vomiting reflex is mediated by the medulla oblongata, which is located in the brainstem. This area of the brain is responsible for controlling a number of automatic physiological processes, including the regulation of heart rate, breathing, and digestive functions such as vomiting. When the medulla detects irritants or other noxious stimuli in the digestive system, it can activate the vomiting reflex, triggering coordinated contractions of the stomach and other muscles that expel the contents of the digestive tract.

The Vomiting Reflex Is Mediated by the Medulla