Calcitonin
Calcitonin hormone is secreted by C- cell in thyroid gland.
It contribute to regulation of blood calcium lever.
It act on bone cells and kidney to reduce blood calcium levels when they are raised.
Its most important effect is to lower blood Ca2+ levels.
It promotes storage of calcium in bones and inhibits reabsorption of calcium by renal tubules.
It's effect is opposite to that of parathyroid glands.
Release of calcitonin is stimulated by increase in blood calcium levels.
This hormone is important during childhood when bones undergo considerable changes in size and shape.
Calcitonin can also be used therapeutically for treatment of Hypercalcemia or osteoporosis.
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