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 also helps regulate cell permeability. It is also very alkaline-forming and critical for the maintenance of acid-base balance of the blood and the body tissues. Calcium is involved in the secretion of male and female hormones, cell division and the water balance of the body.It also stabilizes cell membranes, helps muscles relax, and slows nerve transmission and the heart rate. Calcium also helps prevent fluid loss from cells and from the blood.n this case, calcium becomes biounavailable. That is, an excess occurs in the tissues but it is not available to the body. It becomes essentially a toxic mineral, causing calcium deposits in the joints, arteries, kidneys, brain and elsewhere.