What is the role of the chemoreceptor trigger zone (CTZ) in vomiting? (Select all that apply.)
a. Initiates or induces vomiting
b. Coordinates the vomiting reflex
c. Activates the vomit center (VC) to induce vomiting
d. Samples blood and spinal fluid for potentially toxic substances
ANS: C, D
The CTZ stimulates the VC to induce vomiting as well as samples blood and spinal fluid for potentially toxic substances. The CTZ does not initiate vomiting or coordinate the vomiting reflex.
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