The area postrema is known as the vomiting center.

Name: The area postrema is known as the vomiting center.
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The area postrema is a small region of the brainstem that is located outside the blood-brain barrier. This means that it is directly exposed to the chemicals in the blood, and it is therefore able to detect changes in the composition of the blood. The area postrema is responsible for triggering vomiting in response to certain toxins and drugs.

The Area Postrema Is Known as the Vomiting Center