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parathyroid hormone, vit D, calcitonin
Parathyroid hormone (PTH) and calcitonin regulate blood calcium levels. PTH increases the calcium concentration in the blood, and calcitonin decreases it.
Thyroid
aldosterene
Calcitonin
parathyroid hormone/calcitonin
Calcitonin
Calcitonin
Calcitonin and PTH
Parathyroid glands secrete PTH (parathyroid hormone) to regulate blood calcium levels.
The parathyroid glands produce and secrete parathyroid hormone which regulates calcium levels in the blood. Since it increases blood calcium levels, it promotes the function of osteoclasts, which reduce the calcium in bones and promote its increase in the blood stream.
calcitonin
When calcium levels increase, parathyroid hormone decreases. When calcium levels decrease, parathyroid hormone increases. This is known as a negative feedback system.