Neusea and vomiting that are associated with administration of opioid analgesic is the result of stimulation of the_____________?
Correct answer: C. Chemoreceptor trigger zone (CTZ)
- A. Limbic system
- B. Emetic system
- C. Chemoreceptor trigger zone (CTZ)
- D. Opioid receptors in G.I.T
Explanation
Opioids stimulate the medullary chemoreceptor trigger zone, producing nausea and vomiting. Direct opioid effects on the gastrointestinal tract mainly reduce motility and cause constipation rather than serving as the primary vomiting mechanism.
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