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).
Calcium is needed by the body to function properly. Calcium can affect your nerves, muscles, digestive tract, kidneys, and the way your heart functions. When the calcium level becomes too high, you may develop unusual symptoms. The calcium level in your blood is normally controlled by hormones, the kidneys, and bone.