The research protocol must give a clear indication of what follow up will be provided to the research participants and for how long. This may include a follow u, especially for adverse events, even after data collection for the research study is completed.
The two most important hormones for maintaining calcium levels in the body are parathyroid hormone (PTH) and 1,25(OH)2D (the active form of vitamin D).The major regulator is PTH, which is part of a negative feedback loop to maintain [Ca ++ ] ECF (see Humoral regulation).he two most important hormones for maintaining calcium levels in the body are parathyroid hormone (PTH) and 1,25(OH)2D (the active form of vitamin D).
Bone is the major store of calcium. Calcium reabsorption by the kidney is controlled by parathyroid hormone (PTH) produced by the parathyroid glands, which lie in the posterior part of the lobes of the thyroid gland. PTH secretion is controlled by blood calcium concentrations.one is the major store of calcium. Calcium reabsorption by the kidney is controlled by parathyroid hormone (PTH) produced by the parathyroid glands, which lie in the posterior part of the lobes of the thyroid gland. PTH secretion is controlled by blood calcium concentrations.