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Re: [RC] calcitonin (was Mares Tying Up) - heidi

Heidi, your explanation is right on, but you have your hormones
switched. The substance which releases calcium from bone storage depots
is parathyroid hormone (PTH), not calcitonin.  Calcitonin's job is to
take excess circulating serum calcium and stash it into storage for
mobilization later. Thus, if the ration is consistently too high in
calcium, then calcitonin is produced in excessive levels
(hypercalcitoninism) and the parathyroid gets lazy and produces too
little PTH for mobilization.

Anyway, your explanation of the process is perfect, just substitute
"parathyroid hormone" for "calcitonin". :-)


Thanks for the correction.  :-)  If it isn't a reproductive hormone, I'm
sunk... <g>  Ah, well--the practical application of giving the wedge of
alfalfa for a day or two prior to a planned stress still holds...  :-)

Heidi



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