How, precisely, does ipecac/emetine make one vomit?

How, precisely, does ipecac/emetine make one vomit?

(Yes, this thread was inspired by the last ‘Family Guy’)

I believe it triggers the “poison sensors,” so to speak.

(My alternate answer would be “VIOLENTLY!”

This might help:

“Syrup of Ipecac produces emesis via a central action by stimulating the chemoreceptor trigger zone and also by acting as a local irritant.”

(Found here.)