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Gall bladder redux

I don't recall if Dinogeorge's question about gall
bladders was answered onlist, but here's womething I
read recently concerning gastrointestinal hormones:

"Little research has been done on gastrointestinal
hormones in nonmammals, but there is good evidence for
a gastrinlike mechanism that controls the secretion of
stomach acids. Peptides similar to cholecystokinin are
also present and can stimulate contractions of the
gall bladder. The gall bladders of primitive fishes
contract when treated with mammalian cholecystokinin."

Gall bladders of primitive fishes ... I assume that if
primitive fishes have gall bladders, and we do to,
then reptiles and birds have them as well.


"This case has had full analyzation and has been looked at  a lot. I understand 
the emotionality of death penalty cases."
--George W. Bush, Seattle Post-Intelligencer, June 23, 2000

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