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).
Other hormones may also contribute to maintaining the balance of calcium in the body. Parathyroid hormone is synthesized and stored in the parathyroid glands, which are located on either side of the thyroid gland in the neck.The synthesis of this hormone is regulated by a feedback mechanism that involves the level of blood calcium.ther hormones may also contribute to maintaining the balance of calcium in the body. Parathyroid hormone is synthesized and stored in the parathyroid glands, which are located on either side of the thyroid gland in the neck.