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).
Th only hormone known to be secreted by the parathyroid gland is parathyroid hormone (PTS) which helps to regulate calcium balance by stimulating three target organs: bones, kidneys, and intestines. Because of PTH, calcium and phospates are released from bones, increasing concentration of these substances in blood.