5,582
edits
Changes
→Calcitonin
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Line 75:
===Calcitonin===
===Calcitonin===
−Calcitonin acts to decrease calcium levels in the plasma. It has an overall weaker effect than PTH.
+Calcitonin acts to decrease calcium levels in the plasma. It is overall a weaker regulatory mechanism than PTH.
−Secreted by the parafollicular cells of the Thyroid gland, Calcitonin is stimulated by hypercalcemia, and has the opposite effects of PTH on the bone:
+Secreted by the parafollicular cells of the Thyroid gland, calcitonin is stimulated by hypercalcemia, and has the opposite effects of PTH on the bone:
*Fast Phase - puts calcium into bone fluid by inhibiting osteoclasts' absorptive abilities
*Fast Phase - puts calcium into bone fluid by inhibiting osteoclasts' absorptive abilities
*Slow Phase - puts calcium into bone by reducing formation of new osteoclasts.
*Slow Phase - puts calcium into bone by reducing formation of new osteoclasts.