As a result of low calcium, there may also be high PTH, which may also lead to low serum phosphate.

由于血钙降，PTH可能会增高也会导致血清磷酸盐降。

When serum calcium level is low, PTH is up regulated.

当血清钙水平，PTH升高。

PTH acts to promote calcium release from bones and reduce calcium loss from urine.

PTH可促进钙从骼中释放，并减少尿中钙的流失。

PTH is produced in the parathyroid gland, while calcitriol is made in the kidney.

甲状旁腺产生甲状旁腺激素，肾脏产生化三醇。

The most common cause of hypocalcemia is PTH deficiency, resulting from decreased function of the parathyroid glands or hypoparathyroidism.

钙血症最常见的原因是甲状旁腺功能降或甲状旁腺功能下引起的PTH缺乏。

Now, the levels of calcium and phosphate in the bone, but also in the blood, are regulated by vitamin D and parathyroid hormone, or PTH.

钙和磷不仅存在于中，也存在于血液中，钙磷含量的调节受维生素D和甲状旁腺激素（PTH）调控。

Bone remodelling as a whole is highly dependent on serum calcium levels, which, in turn, are kept in the normal range by a balance between parathyroid hormone, or PTH, calcitonin and vitamin D.

整个重建进程高度依赖于血清中钙的含量，而将血清中钙的含量维持在正常值范围内是由甲状旁腺激素、降血钙素与维生素D间的制约平衡所控制的。