The chemoreceptor trigger zone (CTZ)
A)sends information to the emetic center in the medulla oblongata.
B)is called the vital center.
C)is located in the precentral gyrus.
D)is part of the visual cortex.

Question

Quizplus · Accepted Answer

The chemoreceptor trigger zone (CTZ) is a group of cells in the brainstem that receives signals from various sources, such as the bloodstream and the vestibular system, and is responsible for triggering the sensation of nausea and vomiting. The CTZ then sends information to the emetic center in the medulla oblongata, which controls the act of vomiting. Therefore, option A is the correct answer as it describes the location and function of the CTZ accurately.

Option B is incorrect, as the vital center is a different area of the brainstem that controls essential functions such as breathing and heart rate. Option C is also incorrect, as the precentral gyrus is a region in the cerebral cortex that plays a role in motor function, not in the regulation of nausea and vomiting. Option D is also incorrect, as the visual cortex is responsible for processing visual information, not for regulating nausea and vomiting.

The Chemoreceptor Trigger Zone (CTZ)